The Prophet ﷺ said, "Allah will not look at a man who has intercourse with his wife in her anus."
حدثنا محمد بن عبد الملك بن أبي الشوارب حدثنا عبد العزيز بن المختار عن سهيل بن أبي صالح عن الحارث بن مخلد
عن النبي ﷺ قال لا ينظر الله عز وجل إلى رجل جامع امرأته في دبرها
[Sahih] Reported by Abu Dawud, Nikah, chapter, On the comprehensive rulings of Nikah, h: 2162, from the hadith of Suhayl through this route, and its chain is hasan. Busiri graded it sahih, and it has sahih corroborating narrations. It is one of the mutawatir hadiths.