An Nur Ayah 6
وَٱلَّذِينَ يَرْمُونَ أَزْوَٲجَهُمْ وَلَمْ يَكُن لَّهُمْ شُهَدَآءُ إِلَّآ أَنفُسُهُمْ فَشَهَـٰدَةُ أَحَدِهِمْ أَرْبَعُ شَهَـٰدَٲتِۭ بِٱللَّهِۙ إِنَّهُۥ لَمِنَ ٱلصَّـٰدِقِينَ ٦
And those who accuse their wives ?of adultery? but have no witness except themselves, the accuser must testify, swearing four times by Allah that he is telling the truth,