There is one trashy Islamophobe who cites the following Hadith:-
Anas reported that a person was charged with fornication with the slavegirl of Allah's Messenger (ﷺ). Thereupon Allah's Messenger (ﷺ) said to 'Ali:
Go and strike his neck. 'Ali came to him and he found him in a well making his body cool. 'Ali said to him: Come out, and as he took hold of his hand and brought him out, he found that his sexual organ had been cut. Hadrat 'Ali refrained from striking his neck. He came to Allah's Apostle (ﷺ) and said: Allah's Messenger, he has not even the sexual organ with him. (Sahih Muslim 2771)
The enemy of Islam has raised many objections against Prophet Muhammad (Sallallahu'alayhiwassalam). Some objections are as under:-
Nauzubillah! He is claiming that Prophet Muhammad (Sallallahu'alayhiwassalam) became "jealous" and he ordered the killing of that man.
It was a mere accusation that was proven false but still Prophet Muhammad (Sallallahu'alayhiwassalam) ordered Ali (May Allah Grant Peace To Ali) to kill that man without even investigating the incident.
That atheist has objected that according to Islam, four witnessess should be present in order to testify that adultery or fornication has taken place, yet we see that Prophet Muhammad (Sallallahu'alayhiwassalam) ordered the killing of that man without any witness ever testifying that fornication or adultery ever took place. According to that Atheist, why did not Prophet Muhammad (Sallallahu'alayhiwassalam) asked for four witness if he himself followed the Quran?
He is also claiming that this allegation against that man was raised by Prophet Muhammad (Salllallahu'alayhiwassalam) himslef!
Dear Brothers in Islam, please answer my question, as I am asking this question to defend the honor of Prophet Muhammad (Sallallahu'alayhiwassalam).
May Allah protect us all from such Fitna. Ameen.