24:6 wal-ladhiyna yarmuuna azwaajahum walam yakul lahum shuhadaau il-laa anfusuhum fa shahaadatu aHadihim arba’U shahaadaatim bil-laahi in-nahuu la minaS Saadiqiyn

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Ahmed Raza Khan: Mohammed Aqib Qadri:
And those who accuse their wives and do not have witnesses except their own statements - for such the testimony is that he bear the testimony four times by the name of Allah that he is truthful.

Yusuf Ali:
And for those who launch a charge against their spouses, and have (in support) no evidence but their own,- their solitary evidence (can be received) if they bear witness four times (with an oath) by Allah that they are solemnly telling the truth;

Pickthal:
As for those who accuse their wives but have no witnesses except themselves; let the testimony of one of them be four testimonies, (swearing) by Allah that he is of those who speak the truth;