Ṣaḥīḥ al-Bukhārī & Ṣaḥīḥ Muslim

‘Abdullāh ibn ‘Umar (may Allah be pleased with him) reported: So-and-so came and asked: "O Messenger of Allah, if one of us finds his wife committing adultery: what should he do? If he were to speak, his statement would be a horrible matter, and if he were to remain silent, his silence about the matter would be horrible too." The Messenger of Allah (may Allah's peace and blessings be upon him) remained silent.

After some time, the man came back to the Messenger of Allah (may Allah's peace and blessings be upon him) and said: "I have become afflicted by the very thing I asked you about." Then Allah, the Exalted, revealed these verses of Sūrat An-Nūr (which begins with): {And those who accuse their wives} [Sūrat- An-Nūr: 6]. The Prophet (may Allah's peace and blessings be upon him) recited them to him.

Then he admonished him, exhorted him, and informed him that the torment of this world is less painful than the torment of the Hereafter. The man said: "No, by the One Who sent you with the Truth, I did not tell a lie against her." The Prophet (may Allah's peace and blessings be upon him) then called the wife and admonished her, exhorted her, and informed her that the torment of this world is less painful than the torment of the Hereafter.

She said: "No, by the One Who sent you with the Truth, he is a liar." The Prophet (may Allah's peace and blessings be upon him) started with the man, who testified in the name of Allah four times that he was truthful, and the fifth time, he said: "Let Allah's curse fall upon me if I am a liar." Then the woman was summoned, and she testified four times by the name of Allah that her husband was among the liars, and the fifth time, she said: "Let the anger of Allah fall upon me if he is truthful." Then the Prophet (may Allah's peace and blessings be upon him) separated them and said: "Indeed, Allah knows that one of you is a liar, so would any of you repent?" He said this statement thrice.

According to another wording of the Hadīth, the Prophet (may Allah's peace and blessings be upon him) said: "You have no right over her." The man said: "O Messenger of Allah, what about my money?" The Prophet (may Allah's peace and blessings be upon him) said: "You have no right to get back your money.

If you have told the truth about her, then your money was in return for the sexual intercourse which you lawfully had with her, and if you have told a lie about her, then you are less rightful to get your money back."