Hadith proves Muhammad as a false prophet
So based on the verses from the quran
Surah Al Haqqah - 69 (nice)
69:44 and if Muhammad had made up about Us some [false] sayings,
69:45 We would have seized him by the right hand
69:46 Then We would have cut from him the aorta.
(Translation by Sahih International)
Quite self explanatory really
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https://sunnah.com/bukhari:3169
Zaynab bint Al-Harith wanted to test if he was lying so here is how the hadith goes:
When Khaibar was conquered, a roasted poisoned sheep was presented to the Prophet (ﷺ) as a gift (by the Jews). The Prophet (ﷺ) ordered, "Let all the Jews who have been here, be assembled before me." The Jews were collected and the Prophet (ﷺ) said (to them), "I am going to ask you a question. Will you tell the truth?" They said, "Yes." The Prophet (ﷺ) asked, "Who is your father?" They replied, "So-and-so." He said, "You have told a lie; your father is so-and-so." They said, "You are right." He said, "Will you now tell me the truth, if I ask you about something?" They replied, "Yes, O Abu Al-Qasim; and if we should tell a lie, you can realize our lie as you have done regarding our father." On that he asked, "Who are the people of the (Hell) Fire?" They said, "We shall remain in the (Hell) Fire for a short period, and after that you will replace us." The Prophet (ﷺ) said, "You may be cursed and humiliated in it! By Allah, we shall never replace you in it." Then he asked, "Will you now tell me the truth if I ask you a question?" They said, "Yes, O Abu Al-Qasim." He asked, "Have you poisoned this sheep?" They said, "Yes." He asked, "What made you do so?" They said, "We wanted to know if you were a liar in which case we would get rid of you, and if you are a prophet then the poison would not harm you."
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https://sunnah.com/bukhari:4428
Aisha confirms this in this hadith:
The Prophet (ﷺ) in his ailment in which he died, used to say, "O `Aisha! 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."