Narrated Ibn `Abbas:

Hilal bin Umaiya accused his wife of committing illegal sexual intercourse with Sharik bin Sahma' and filed the case before the Prophet. The Prophet (ﷺ) said (to Hilal), "Either you bring forth a proof (four witnesses) or you will receive the legal punishment (lashes) on your back." Hilal said, "O Allah's Apostle! If anyone of us saw a man over his wife, would he go to seek after witnesses?" The Prophet (ﷺ) kept on saying, "Either you bring forth the witnesses or you will receive the legal punishment (lashes) on your back." Hilal then said, "By Him Who sent you with the Truth, I am telling the truth and Allah will reveal to you what will save my back from legal punishment." Then Gabriel came down and revealed to him:-- 'As for those who accuse their wives...' (24.6-9) The Prophet (ﷺ) recited it till he reached: '... (her accuser) is telling the truth.' Then the Prophet (ﷺ) left and sent for the woman, and Hilal went (and brought) her and then took the oaths (confirming the claim). The Prophet (ﷺ) was saying, "Allah knows that one of you is a liar, so will any of you repent?" Then the woman got up and took the oaths and when she was going to take the fifth one, the people stopped her and said, "It (the fifth oath) will definitely bring Allah's curse on you (if you are guilty)." So she hesitated and recoiled (from taking the oath) so much that we thought that she would withdraw her denial. But then she said, "I will not dishonor my family all through these days," and carried on (the process of taking oaths). The Prophet (ﷺ) then said, "Watch her; if she delivers a black-eyed child with big hips and fat shins then it is Sharik bin Sahma's child." Later she delivered a child of that description. So the Prophet (ﷺ) said, "If the case was not settled by Allah's Law, I would punish her severely."

Sa'id b Jubair reported: I was asked about the invokers of curses during the reign of Mus'ab (b. Zubair) whether they could separate (themselves by this process). He said: I did not understand what to say. So I went to the house of Ibn 'Umar (Allah be pleased with them) in Mecca. I said to his servant: Seek permission for Me. He said that he (Ibn 'Umar) had been taking rest. He (Ibn 'Umar) heard my voice. and said: Are you Ibn Jubair? I said: Yes. He'said: Come in. By Allah, it must be some (great) need which has brought you here at this Hour. So I got in and found him lying on a blanket reclining against a pillow stuffed with fibres of date-palm. I said: O Abu'Abd al-Rahman, should there be separation between the invokers of curses? He said: Hallowed be Allah, yes, The first one who asked about it was so and so. he said: Messenger of Allah, tell me If one of us finds his wife committing adultery: what should he do? If he talks, that is something great, and if he keeps quiet that is also (something great) (which he cannot afford to do). Allah's Prophet (ﷺ) kept quiet (or some time). After some time he (that very person) came to him (Allah's Messenger) and said: I have been involved in that very cage about which I had asked you Allah the Exalted and Majestic then revealed (these) verses of Surah Nur:" Those who accuse their wives" (verse 6), and he (the Holy Prophet) recited them to him and admonished him, and exhorted him and informed him that the torment of the world is less painful than the torment of the Hereafter. He said: No, by Him Who sent you with Truth, I did not tell a lie against her. He (the Holy Prophet) then called her (the wife of that person who had accused her) and admonished her, and exhorted her, and informed her that the torment of this world is less painful than the torment of the Hereafter. She said: No, by Him Who sent thee with Truth, he is a liar. (it was) the man who started the swearing of oath and he swore in the name of Allah four times that he was among the truthful. and at the fifth turn he said: Let there be curse of Allah upon him if he were among the liars. Then the woman was called and she swore four times in the name of Allah that he (her husband) was among the liars, and at the fifth time (she said): Let there be curse upon her if he were among the truthful. He (the Holy Prophet) then effected separation between the two.

'Abdullah reported: We were on the night of Friday staying in the mosque when a person from the Ansar came there and said: If a person finds hiswoman along with a man, and he speaks about it, you would lash him, and if he kills, you will kill him, and if he keeps quiet he shall have to consume anger. By Allah, I will definitely ask about him from Allah's Mescenger (ﷺ). On the following day he came to Allah's Messenger (ﷺ) and asked him thus: If a man were to find with his wife a man and if he were to talk about it, you would lash him; and if he killed, you would kill him, and if he were to keep quiet. he would consume anger, whereupon he (the Holy Prophet) said: Allah, solve (this problem), and he began to supplicate (before Him), and then the verses pertaining to li'an were revealed:" Those who accuse their wives and have no witnesses except themselves" (xxiv. 6). The person was then put to test according to these verses in the presence of the people. There came he and his wife in the presence of Allah's Messenger (ﷺ), and they invoked curses (in order to testify their claim). The man swore four times in the name of Allah that he was one of the truthful and then invoked curse for the fifth time saying: Let there be curse of Allah upon him if he were among the liars. Then she began to invoke curse. Allah's Messenger (ﷺ) said to her: just wait (and curse after considering over it), but she refused and invoked curse and when she turned away, he (Allah's Messenger) said: It seems that this woman shall give birth to a curly-haired black child, And so she did gave birth to a curly-haired black child.