Narrated Sahl bin Saud:'Uwaimir came to `Asim bin `Adi who was the chief of Bani Ajlan and said, "What do you say about a man who has found another man with his wife? Should he kill him whereupon you would kill him (i.e. the husband), or what should he do? Please ask Allah's Messenger (ﷺ) about this matter on my behalf." `Asim then went to the Prophet (ﷺ) and said, "O Allah's Messenger (ﷺ)! (And asked him that question) but Allah's Messenger (ﷺ) disliked the question," When 'Uwaimir asked `Asim (about the Prophet's answer) `Asim replied that Allah's Messenger (ﷺ) disliked such questions and considered it shameful. "Uwaimir then said, "By Allah, I will not give up asking unless I ask Allah's Messenger (ﷺ) about it." Uwaimir came (to the Prophet ) and said, "O Allah's Messenger (ﷺ)! A man has found another man with his wife! Should he kill him whereupon you would kill him (the husband, in Qisas) or what should he do?" Allah's Messenger (ﷺ) said, "Allah has revealed regarding you and your wife's case in the Qur'an "So Allah's Messenger (ﷺ) ordered them to perform the measures of Mula'ana according to what Allah had mentioned in His Book. So 'Uwaimir did Mula'ana with her and said, "O Allah's Messenger (ﷺ)! If I kept her I would oppress her." So 'Uwaimir divorced her and so divorce became a tradition after them for those who happened to be involved in a case of Mula'ana. Allah's Messenger (ﷺ) then said, "Look! If she (Uwaimir's wife) delivers a black child with deep black large eyes, big hips and fat legs, then I will be of the opinion that 'Uwaimir has spoken the truth; but if she delivers a red child looking like a Wahra then we will consider that 'Uwaimir has told a lie against her." Later on she delivered a child carrying the qualities which Allah's Messenger (ﷺ) had mentioned as a proof for 'Uwaimir's claim; therefore the child was ascribed to its mother henceforth.
Reference
Sahih al-Bukhari 4745
In-book reference
Book 65, Hadith 267
USC-MSA web (English)
Vol. 6, Book 60, Hadith 269
Translation by Dr. M. Muhsin Khan · Language: EN
Sahih
It is related that Sahl ibn Sa'd said, "'Uwaymir went to 'Asim ibn 'Adi, the chief of Banu 'Ajlan, and said, 'What do you say about a man who finds another man with his wife? Should he kill him and then you kill him? What else should he do? Ask the Messenger of Allah, may Allah bless him and grant him peace,about that.' So 'Asim went to the Prophet, may Allah bless him and grant him peace, and said, 'Messenger of Allah.' The Messenger of Allah, may Allah bless him and grant him peace, disliked such questions. So 'Uwaymir asked 'Asim and he replied, 'The Messenger of Allah, may Allah bless him and grant him peace, dislikes such questions and finds them unseemly.' 'Uwaymir said, 'By Allah, I will not stop until I ask the Messenger of Allah, may Allah bless him and grant him peace, about that!' "So 'Uwaymir went and said, 'Messenger of Allah, if a man finds another man with his wife, should he kill him and then you kill him? What else should he do?' The Messenger of Allah, may Allah bless him and grant him peace, said, 'Allah has revealed in the Qur'an about you and your wife.' So the Messenger of Allah* commanded the two of them to curse one another according to what Allah prescribed in His Book. He performed the li'an on her and then said, 'Messenger of Allah, if I kept her, I would wrong her.' So he divorced her, and divorce became a sunna after them for those who carried out the li'an. "Then the Messenger of Allah, may Allah bless him and grant him peace, said, 'Wait and see. If she brings a black child with dark eyes, large buttocks and fleshy legs, then I think that 'Uwaymir spoke the truth. If she has a reddish child like the wahra lizard (white with reddish spots), then I think that he has lied about her.' She bore a child who has the description which the Messenger of Allah, may Allah bless him and grant him peace, said showed the truthfulness of 'Uwaymir, and after that the child was ascribed to his mother."
Reference
Sahih al-Bukhari 4745
In-book reference
Book 65, Hadith 267
USC-MSA web (English)
Vol. 6, Book 60, Hadith 269
Translation by Aisha Bewley · Language: EN
Sahih