An Nur, 6 Ayah
24:6
وَٱلَّذِينَ يَرۡمُونَ أَزۡوَٰجَهُمۡ وَلَمۡ يَكُن لَّهُمۡ شُهَدَآءُ إِلَّآ أَنفُسُهُمۡ فَشَهَٰدَةُ أَحَدِهِمۡ أَرۡبَعُ شَهَٰدَٰتِۭ بِٱللَّهِ إِنَّهُۥ لَمِنَ ٱلصَّٰدِقِينَ ٦
Wa Al-Ladhīna Yarmūna 'Azwājahum Wa Lam Yakun Lahum Shuhadā'u 'Illā 'Anfusuhum Fashahādatu 'Aĥadihim 'Arba`u Shahādātin ۙ Bil-Lahi 'Innahu Lamina Aş-Şādiqīna
And those who accuse their wives [of adultery] and have no witnesses except themselves - then the witness of one of them [shall be] four testimonies [swearing] by Allah that indeed, he is of the truthful.