﴿ وَيَدْرَؤُا۟ عَنْهَا ٱلْعَذَابَ أَن تَشْهَدَ أَرْبَعَ شَهَٰدَٰتٍۭ بِٱللَّهِ ۙ إِنَّهُۥ لَمِنَ ٱلْكَٰذِبِينَ ﴾

“But [as for the wife, all] chastisement shall be averted from her by her calling God four times to witness that he is indeed telling a lie,”

And the punishment namely the prescribed legal punishment for fornication that is established upon his testimony shall be averted from her if she testify swearing by God four times that he is indeed lying in accusing her of having fornicated;