Mishkat al-Masabih 13 Marriage كتاب النكاح 111

وَعَنْ أَبِي هُرَيْرَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَلْعُونٌ مَنْ أَتَى امْرَأَتَهُ فِي دُبُرِهَا» . رَوَاهُ أَحْمَدُ وَأَبُو دَاوُدَ

Abu Huraira reported God’s Messenger as saying, “He who has intercourse with his wife through her anus is accursed.” Ahmad and Abu Dawud transmitted it.