It is narrated from Sayyiduna al-Bara' bin Azib (may Allah be pleased with him) that he said: In the time of the Messenger of Allah (peace and blessings be upon him), I was searching for some camels of mine that had gone astray. While I was wandering among some houses, I suddenly saw riders and horsemen who came and surrounded (a house) and brought a man out. They neither questioned him nor spoke to him, until they struck off his head. When they had gone, I asked about him, and the people said: "He had married his father's wife."