Sahih al-Bukhari 5259
Abdullah bin Yusuf (Tinnisi) narrated to us that Malik told us. He narrated from Ibn Shihab that Hazrat Sahl bin Sa'd Sa'idi (ra) informed him that Uwaimir Ajlani (ra) came to Asim bin Adi Ansari (ra) and said to him: Asim (ra), just tell me: If a man has found another man with his wife, will you also kill him if he kills that man, or what should he do? Asim (ra), ask the Messenger of Allah (saw) about this for me. So Asim (ra) asked the Messenger of Allah (saw) about it. The Messenger of Allah (saw) disliked such questions and considered them objectionable, so much so that what he had heard from the Messenger of Allah (saw) weighed heavily upon Asim (ra). When Asim (ra) returned to his family, Uwaimir (ra) came and said: Asim (ra), what did the Messenger of Allah (saw) say to you? Asim (ra) said: You have not done me any good. The Messenger of Allah (saw) disliked the question about which I asked him. Uwaimir (ra) said: By Allah, I shall not stop until I have asked him (saw) about it. Saying this, Uwaimir (ra) went off and came to the Messenger of Allah (saw) while he (saw) was sitting among the people, and said: O Messenger of Allah (saw)! Tell me about a man who has found another man with his wife: if he kills him, will you (people) then kill him too? Or what should he do? The Messenger of Allah (saw) said: “Allah has sent down a command concerning you and your wife. Go and bring her.” Hazrat Sahl (ra) used to say: Then the two of them carried out mutual imprecation (Li'an) against each other, and I too was sitting with the people near the Messenger of Allah (saw). When the two of them had finished, Uwaimir (ra) said: O Messenger of Allah (saw)! If I keep her in my house, then I have indeed told a lie about her. Therefore he gave this woman three divorces before the Messenger of Allah (saw) could command him. Ibn Shihab said: After that this became the practice of those who carry out mutual imprecation.
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