And those who accuse their wives of fornication but have no witnesses to substantiate this except themselves — which happened with some Companions — then the testimony of one of them fa-shahādatu ahadihim the subject shall be to testify swearing by God four times araba‘a shahādātin is in the accusative as a verbal noun that he is indeed being truthful in accusing his wife of committing fornication
- 24:66
وَالَّذِينَ يَرْمُونَ أَزْوَاجَهُمْ وَلَمْ يَكُنْ لَهُمْ شُهَدَاءُ إِلَّا أَنْفُسُهُمْ فَشَهَادَةُ أَحَدِهِمْ أَرْبَعُ شَهَادَاتٍ بِاللَّهِ ۙ إِنَّهُ لَمِنَ الصَّادِقِينَ
Those who accuse their wives and do not have any witnesses except themselves, should swear four times in the name of God, the testimony of each such person being that he is speaking the truth,
- common.revelation-Medinan
- common.hizb : 140