An-Nur 24:6

<h2>Details of Al-Li`an</h2><p>This Ayah offers a way out for husbands. If a husband has accused his wife but cannot come up with proof, he can swear the Li`an (the oath of condemnation) as Allah commanded. This means that he brings her before the Imam and states what he is accusing her of. The ruler then asks him to swear four times by Allah in front of four witnesses</p><p>إِنَّهُ لَمِنَ الصَّـدِقِينَ</p><p>(that he is one of those who speak the truth) in his accusation of her adultery.</p><p>وَالْخَامِسَةُ أَنَّ لَعْنَةَ اللَّهِ عَلَيْهِ إِن كَانَ مِنَ الْكَـذِبِينَ</p><p>(And the fifth; the invoking of the curse of Allah on him if he be of those who tell a lie.) If he says that, then she is divorced from him by the very act of this Li`an; she is forever forbidden for him and he must give her Mahr to her. The punishment for Zina should be carried out on her, and nothing can prevent the punishment except if she also swears the oath of condemnation (Li`an) and swears by Allah four times that he is one of those who lied, i.e., in what he is accusing her of;</p><p>وَالْخَامِسَةَ أَنَّ غَضَبَ اللَّهِ عَلَيْهَآ إِن كَانَ مِنَ الصَّـدِقِينَ</p><p>(And …

As for those who accuse their wives but have no witnesses except themselves; let the testimony of one of them be four testimonies, (swearing) by Allah that he is of those who speak the truth;

And for those who launch a charge against their spouses, and have (in support) no evidence but their own,- their solitary evidence (can be received) if they bear witness four times (with an oath) by Allah that they are solemnly telling the truth;

And for those who accuse their wives, but have no witnesses except themselves, let the testimony of one of them be four testimonies (i.e. testifies four times) by Allah that he is one of those who speak the truth.

As for those who accuse their own spouses, but have no witnesses except themselves, the testimony of one of them is equivalent to four testimonies, if he swears by God that he is truthful.