A man made his wife like the back of his mother. He then had intercourse with her before he atoned for it. He came to the Prophet ﷺ and informed him of this matter. He asked (him): What moved you to the action you have committed? He replied: I saw the whiteness of her shins in moon light. He said: Keep away from her until you expiate for your deed.
أَنَّ رَجُلاً ظَاهَرَ مِنَ امْرَأَتِهِ ثُمَّ وَاقَعَهَا قَبْلَ أَنْ يُكَفِّرَ فَأَتَى النَّبِيَّ ﷺ فَأَخْبَرَهُ فَقَالَ مَا حَمَلَكَ عَلَى مَا صَنَعْتَ قَالَ رَأَيْتُ بَيَاضَ سَاقَيْهَا فِي الْقَمَرِ قَالَ فَاعْتَزِلْهَا حَتَّى تُكَفِّرَ عَنْكَ