Quran 58, Al-Mujadila (She who disputes) ⓘ

58:3Those who put away their wives (by saying they are as their mothers) and afterward would go back on that which they have said, (the penalty) in that case (is) the freeing of a slave before they touch one another. Unto this ye are exhorted; and Allah is Informed of what ye do.

وَالَّذِينَ يُظَاهِرُونَ مِنْ نِسَائِهِمْ ثُمَّ يَعُودُونَ لِمَا قَالُوا فَتَحْرِيرُ رَقَبَةٍ مِنْ قَبْلِ أَنْ يَتَمَاسَّا ذَلِكُمْ تُوعَظُونَ بِهِ وَاللَّهُ بِمَا تَعْمَلُونَ خَبِيرٌ