It was narrated from Abu Hurairah:
that the Prophet said: “Allah will not look at a man who has intercourse with his wife in her buttocks.”
حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ الْمَلِكِ بْنِ أَبِي الشَّوَارِبِ، حَدَّثَنَا عَبْدُ الْعَزِيزِ بْنُ الْمُخْتَارِ، عَنْ سُهَيْلِ بْنِ أَبِي صَالِحٍ، عَنِ الْحَارِثِ بْنِ مُخَلَّدٍ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ ـ صلى الله عليه وسلم ـ قَالَ " لاَ يَنْظُرُ اللَّهُ إِلَى رَجُلٍ جَامَعَ امْرَأَتَهُ فِي دُبُرِهَا
" .
Grade : Sahih (Darussalam)
English reference : Vol. 3, Book 9, Hadith 1923
Arabic reference : Book 9, Hadith 1998
http://sunnah.com/urn/1262420
Abu Huraira reported Allah's Messenger (may peace be upon him) as saying: Avoid suspicion, for suspicion is the gravest lie in talk and
do not be inquisitive about one another and do not spy upon one another and do not feel envy with the other, and nurse no malice, and nurse no aversion and hostility against one another. And be fellow-brothers and servants of Allah.
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