Narrated Al-Bara ibn Azib: while I was wandering in search of my camels which had strayed, a caravan or some horsemen carrying a standard came forward. The bedouin began to go round me for my position with the Prophet ﷺ. They came to a domed structure, took out a man from it, and struck his neck. I asked about him. They told me that he had married his father's wife.
Hadith Referenceسنن ابي داود / كتاب الحدود / 4456
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:إسناده صحيح, مشكوة المصابيح (3172)
Narrated Al-Bara ibn Azib: I met my uncle who was carrying a standard. I asked him: Where are you going? He said: The Messenger of Allah ﷺ has sent me to a man who has married his father's wife. He has ordered me to cut off his head and take his property.