Sahih Muslim, 7023

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

Rapporté par Anas رضي الله عنه : Un homme fut accusé de fornication avec la servante du Messager d’Allah ﷺ. Le Prophète ﷺ dit alors à Ali رضي الله عنه : « Va et tranche-lui la tête. » Ali le trouva dans un puits, en train de se rafraîchir. Il lui dit : « Sors de là. » Quand il le fit sortir, il constata qu’il n’avait même plus d’organe sexuel. Ali s’abstint alors de le tuer et rapporta cela au Prophète ﷺ, en disant : « Ô Messager d’Allah, il n’a même plus d’organe sexuel. »