Musannaf Ibn Abi Shaybah 29717 — A man who finds a man with his wife

Alqamah said that Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: While we were in the mosque one night, a man suddenly came and said: If a man finds another man with his wife and kills him, will you kill him? Or if he accuses her, will you flog him? I shall certainly mention this matter to the Prophet (peace and blessings be upon him). So he came to the Prophet (peace and blessings be upon him) and mentioned this to him (peace and blessings be upon him), and he (peace and blessings be upon him) remained silent. Then the verse of li'an was revealed. The Prophet (peace and blessings be upon him) called that man and recited these verses to him. After that, the man came and accused his wife, so the Messenger of Allah (peace and blessings be upon him) ruled that the two of them should perform li'an, and he (peace and blessings be upon him) said: "Perhaps she will bring forth a black, curly-haired child." And she did bring forth a black, curly-haired child.