The Qur'an is short, clear and to the point when telling us how Allah would kill Muhammad if he was a false prophet. According to the Qur'an, if Muhammad was to invent a false revelation or make up verses of the Qur'an, Allah would kill him by severing his aorta. The aorta is the large artery that comes out of the left ventricle of your heart; some Muslim sources translate it as "the life artery."
Sura 69, verses 44 to reads:
Qur'an 69:44-46 - And if he (Muhammad) had forged a false saying concerning Us We surely should have seized him by right hand (or with power and might), and then certainly should have cut off his life artery (Aorta). [Hilali-Khan]
Muhammad is saying, "If I am a false prophet, Allah will sever my aorta". People who advance silly arguments like: "I'm a prophet and if I'm lying God will strike me dead with lightening. Ah Ah, see no lightening, this proves I'm telling the truth." are, invariably, charlatans.
Many people wanted, of course, to kill Muhammad. The pagans wanted to kill him for destroying their towns, slaughtering their men, taking their women as sex-slave, and enslaving their children. Jews wanted to kill him for destroying their towns, slaughtering their men, taking their women as sex-slave, and enslaving their children. Christians wanted to kill him for destroying their towns, slaughtering their men, taking their women as sex-slave, and enslaving their children. Muhammad had made an awful lot of enemies.
If one reads the Muslim sources, the Hadith and the Siral literature, you will find that there is no mystery about Muhammad's death. These Muslim's sources all concur in recording that Muhammad was poisoned. Further, according to Sahih al-Bukhari, Sahih Muslim and other texts, Muhammad was poisoned by a Jewish woman.
Sahih al-Bukhara 2617 - A Jewess brought a poisoned (cooked) sheep for the Prophet who ate it. She was brought to the Prophet and was asked, "Shall we kill her?" He said, "No." Anas added: "I continued to see the effect of the poison on the palate of the mouth of Allah's Messenger."
Sahih Muslim 5430 - A Jewess came to Allah's Messenger with poisoned mutton and he took of what had been brought to him. (When the effects of this poison were felt by him) he called for her and asked her about that, whereupon she said: I had determined to kill you. Thereupon he said: Allah will never give you the power to do it.
When Zaynab [the Jewess who poisoned him] told Muhammad that she had poisoned him, Muhammad responded that Allah would never allow it. It would seem that Muhammad didn't know Allah quite as well as he imagined, because the poison in due course did kill him.
In case you are wondering why this woman wanted to poison Muhammad, her own words have been recorded by these same Muslim sources:
Ibn Sa'd, p. 252 - The Apostle of Allah sent for Zahnab Bint al-Harith [the Jewess who poisoned Him] and said to her: What induced you do what you have done? She replied: You have done to my people what you have done. You have killed my father, my uncle, and my husband, so I said to myself: If you are a prophet, the foreleg will inform you; and others have said: If you are a king, we will get rid of you.
Khaybar is the name of an oasis some 153 km (95 miles) to the north of Medina (ancient Yathrib), Saudi Arabia. Before the rise of Islam, this fortress town was inhabited by Jewish tribes. It fell to Muslim forces in 629 AD
Following Muhammad attack on Khaybar, and the murder of their men and raping of their women - standard practise for Muslims - a Jewish woman, whose entire family had been slaughtered by the Muslims, approaches Muhammad and offers to cook his dinner! - and Muhammad accepts, "Sure, I love lamb. So nice of you to cook dinner for us after we butchered your father, your uncle and your husband." If a woman comes up to you and says, "Hi, you've slaughtered my family; care for a delicious meal?" and the only response you can think of is: "Durr, yea, I think so, yummy, yummy," surely this should raise some questions around the quality of your judgement, to say the very lest.
But there is a very interesting twist to this story:
Sahih al-Bukhari 4428 - The Prophet in his ailment in which he died, used to say, "O Aishah [his child bride]! I still feel the pain caused by the food I ate at Khaibar, and at this time, I feel as if my aorta is being cut from that poison."
What's that Muhammad ? Something about your aorta being cut? That's funny, I seem to recall you telling us in the Qur'an that if Allah was going to kill you for being a false prophet, he'd do it by severing your aorta. But lets keep reading:
Sunan Abu Dawud 4498 - A Jewess presented [Muhammad ] at Khaibar a roasted sheep which she had poisoned. The Apostle of Allah ate of it and the people also ate. He then said: Lift your hands (from eating) for it has informed me that it is poisoned. Bishr b. al-Bara b. Ma'rur al-Ansari died. So he (the Prophet) sent for the Jewess (and said to her): What motivated you to do the work you have done? She said: If you were a prophet, it would not harm you; but if you were a king, I would rid the people of you. The Apostle of Allah then ordered regarding her that she was killed. He then said about the pain of which he died: I continue to feel pain from the morsel which I had eaten at Khaibar. This is the time when it has cut off my aorta.
There's that pesky aorta again! Notice the passage says that Muhammad 's companion Bishr died from eating the poison. Interestingly, before Bishr died he told Muhammad that as soon as he put the lamb in his mouth he could taste the poison, but he ate it anyway because he saw Muhammad eating it.
Muhammad claimed that the lamb he was eating spoke to him, and told him that it was poisoned. So he got a special revelation because he was a prophet. Two questions: one, why didn't the roasted lamb say something five minutes earlier, that would have saved Muhammad's life, not to mention Bishr's life? And two, why did Muhammad need a revelation when one could taste the poison? Doesn't this suggest that Muhammad was actually making up revelations, isn't it obvious that he tasted the poison, same as Bishr did, but instead of saying, "Hey, I taste poison!" he said, "It's speaking to me, I'm a prophet." Sounds a bit fishy, doesn't it?
Sunan Abū ‘Abd, pp. 252-253 - The Apostle of Allah took the foreleg, a piece of which he put into his mouth. Bishr Ibn al-Bara took another bone and put it into his mouth. When the Apostle of Allah ate one morsel of it Bishr ate his and other people also ate from it. Then the Apostle of Allah said: Hold back your hands! Because this foreleg has informed me that it is poisoned. Thereupon Bishr said: By Him Who hath made you great! I discovered it from the morsel I took. Nothing prevented me from spitting it out, but the idea that I did not like to make your food un-relishing. When you had eaten what was in your mouth, I did not like to save my life after yours, and I also thought you would not have eaten it if there was something wrong. Bishr did not rise from his seat but his colour changed to that of taylsan (a green cloth).
Bishr died immediately because he had trusted Muhammad . Muhammad died also, but his agony and sickness lasted much longer. Muhammad described his pain to Bishr's mother:
Sunan Abu Dawud 4449 - Umm Bishr [Bishe mother] said to the Prophet during the sickness of which he died: What do you think about your illness, Apostle of Allah? I do not think about the illness of my son except the poisoned sheep of which he had eaten with you at Khaibar. The Prophet said: And I do not think about my illness except that, this is the time when it cut off my aorta.
There's that pesky "severed aorta" again.
At-Tabari, p. 124 - The Messenger of God said during the illness from which he died - the mother of Bishr b. al-Bara had come to visit him - "Umm Bishr, at this very moment I feel my aorta being severed because of the food I ate with your son at Khaybar."
There's that pesky "severed aorta" again.
According to Aishah [Muhammad's child bride], Muhammad was in excruciating agony before his death. And as Muhammad had killed people for abandoning Islam by chopping off their hands and feet and burning out their eyes, Aishah probably knew a thing or two about what an agonising death looked like:
Sunan Ibn Majah 1622 - Aishah said: "I never saw anyone suffer more pain than the Messenger of Allah."
Further, according to Aishah, near the end, Muhammad couldn't even walk on his own; his followers had to drag him around.
Sahih al-Bukhari 2588 - Aisha said, "When the Prophet became sick and his condition became serious, he requested his wives to allow him to be treated in my house, and they allowed him. He came out leaning on two men while his feet were dragging on the ground."
When the Jews sought to kill Jesus, according to the Qur'an Allah intervened and rescued Him. This is sura 4: 157-158 - Allah transported Jesus safely to Paradise and had someone else, whom Allah had made to looked like Jesus, crucified in his place.
Yet when a Jew wanted to kill Muhammad, Allah sits back and watches as a Jewess poisons his prophet, in fact he abandons his prophet to a long-drawn-out, degrading, agonizing death. Why (according to the Qur'an) does Allah protect Jesus from harm, zapping Him straight to Paradise when He is in danger, but when he sees Muhammad wallowing in freakish agony, Allah doesn't lift a finger to help?
There are thousands of ways to die, do you really think it is a mere coincidence that Muhammad said that he felt he was dying in exactly the way the Qur'an said he would die if he was a deceiver and a false prophet?
Muhammad did more than anyone else in history to promote hatred against Jews, Muhammad did more than anyone else in history to denigrate women, telling his followers that women are stupid and that Hell was full of women. And to add insult to injury, Muhammad died at the hands of a Jewish woman.
If you read the Muslim sources, you know that every time Muhammad wants something, Allah gives him a special revelation granting him what he desires. Muhammad wants to have sex with nine year old Aisha, Allah grants him a revelation. Muhammad wants to have more than four wives, Allah grants him a revelation. Muhammad wants to have sex with the wife of his own adopted son, Allah grants him a revelation. Muhammad wants to have sex with a slave girl, Allah grants him a revelation. For two decades, Allah appears to have little to do except sit around all day making Muhammad 's erotic fantasies come true.
Muhammad's ultimate wish was to die in battle, it was his greatest desire, but instead of letting Muhammad die while fighting the Jews, Allah lets him die a degrading death, in prolonged agony, at the hands of a Jewish woman. Having spent more than two decades granting Muhammad everything he wanted, Allah suddenly decides not to give Muhammad what he wanted most!
The manner of Muhammad's death looks like divine providence; the justice seems just a little too poetic to be mere coincidence.
 Sahih al-Bukhārī: Sunni Muslims view this as one of the most trusted collections of hadith (prophetic traditions) along with Sahih Muslim. In some circles, it is considered the most authentic book after the Qur'an. The Arabic word sahih translates as authentic or correct.
 Sahih Muslim (full title: Al-Musnadu Al-Sahihu bi Naklil Adli) is one of the six major hadith collections It is highly acclaimed by Sunni Muslims as well as Zaidi Shia Muslims and considered the second most authentic hadith collection after Sahih al-Bukhari.
 Ibn Sa'd was a Sunni scholar and Arabian biographer. He was born in 784 AD and died in 845 AD. His teachers included Al-Waqidi. He had a reputation for being both trustworthy and accurate in his writings.
 Sunan Abu Dawud collected 500,000 hadith, but included only 4,800 in this collection. Sunnis regard this collection as fourth in strength of their six major hadith collections. His sunan has been accepted as a standard work by scholars from many parts of the Islamic world,
 At-Tabari - Abū Jaʿfar Muḥammad ibn Jarīr al-Ṭabarī (839–923 AD) was a prominent and influential Persian scholar, historian and exegete of the Qur'an. His most influential and best known works are his Qur'anic commentary and his historical chronicle, History of the Prophets and Kings.