﴿ 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,”

Please check ayah 24:10 for complete tafsir.