24:6
وَالَّذِيۡنَ يَرۡمُوۡنَ اَزۡوَاجَهُمۡ وَلَمۡ يَكُنۡ لَّهُمۡ شُهَدَآءُ اِلَّا٘ اَنۡفُسُهُمۡ فَشَهَادَةُ اَحَدِهِمۡ اَرۡبَعُ شَهٰدٰتٍۭ بِاللّٰهِۙ اِنَّهٗ لَمِنَ الصّٰدِقِيۡنَ
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