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حَدَّثَنِي زُهَيْرُ بْنُ حَرْبٍ حَدَّثَنَا عَفَّانُ حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ أَخْبَرَنَا ثَابِتٌ عَنْ أَنَسٍ أَنَّ رَجُلًا كَانَ يُتَّهَمُ بِأُمِّ وَلَدِ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لِعَلِيٍّ اذْهَبْ فَاضْرِبْ عُنُقَهُ فَأَتَاهُ عَلِيٌّ فَإِذَا هُوَ فِي رَكِيٍّ يَتَبَرَّدُ فِيهَا فَقَالَ لَهُ عَلِيٌّ اخْرُجْ فَنَاوَلَهُ يَدَهُ فَأَخْرَجَهُ فَإِذَا هُوَ مَجْبُوبٌ لَيْسَ لَهُ ذَكَرٌ فَكَفَّ عَلِيٌّ عَنْهُ ثُمَّ أَتَى النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ يَا رَسُولَ اللَّهِ إِنَّهُ لَمَجْبُوبٌ مَا لَهُ ذَكَرٌ

Narrated to us Zuhair bin Harb narrated to us Affan narrated to us Hammad bin Salamah informed us Thabit from Anas that a man was accused of committing adultery with the wife of the Messenger of Allah, peace and blessings be upon him. So the Messenger said to Ali: Go and behead him (for his hypocrisy). Ali went to him, finding him cooling himself in a small well. Ali said to him: Come out! Then Ali pulled his hand and found he was a man without genitals. So Ali did not kill him. Ali returned to the Messenger and said: O Messenger of Allah, indeed he is a man without genitals.