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.
strong>Meaning:-
Adultery: voluntary sexual activity (as sexual intercourse) between a married man and someone other than his wife or between a married woman and someone other than her husband also.
Testimonies: a declaration of truth or fact.