Chapter 30: The Book of Legal Punishments
Abu Huraira reported that a person from amongst the Muslims came to Allah' s Messenger (ﷺ) while he was in the mosque. He called him saying: Allah' s Messenger. I have committed adultery. He (the Holy Prophet) turned away from him, He (again) came round facing him and said to him: Allah' s Messenger, I have committed adultery. He (the Holy Prophet) turned away until he did that four times, and as he testified four times against his own self, Allah' s Messenger (ﷺ) called him and said: Are you mad? He said: No. He (again) said: Are you married? He said: Yes. Thereupon Allah' s Messenger (ﷺ) said: Take him and stone him.
Sahih Muslim 1691c