It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the couples who undertake li'an (mutual imprecation) were mentioned in the presence of the Messenger of Allah (peace and blessings be upon him), and Asim said something about it and then left. Then a man from his people came to him and told him that he had found a man with his wife. Asim said: I have been put to this trial only because of my (own) words. So he took him to the Messenger of Allah (peace and blessings be upon him), and he told him ((peace and blessings be upon him)) of the state in which he had found his wife. That man (the woman's husband) was of yellowish complexion, lean and straight-haired, while the man whom he claimed to have found with his wife was of reddish complexion and heavily built. The Prophet (peace and blessings be upon him) said: "O Allah, make the truth clear." Then the woman gave birth to a child resembling the man whom her husband had mentioned finding with her, and so the Messenger of Allah (peace and blessings be upon him) had the two of them undergo li'an. A man in the gathering asked Ibn Abbas (may Allah be pleased with them both): Is she the woman about whom the Messenger of Allah (peace and blessings be upon him) said: "If I were to stone a woman without evidence, I would have stoned her"? Ibn Abbas (may Allah be pleased with them both) said: No, that was another woman who used to commit indecency openly in Islam.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10669