عَنْ عَلِيٍّ رَضِيَ اللَّهُ عَنْهُ قَالَ جَاءَ أَعْرَابِيٌّ إِلَى النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ فَقَالَ يَا رَسُولَ اللَّهِ إِنَّا نَكُونُ بِالْبَادِيَةِ فَتَخْرُجُ مِنْ أَحَدِنَا الرُّوَيْحِيَةُ فَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ إِنَّ اللَّهَ عَزَّ وَجَلَّ لَا يَسْتَحْيِي مِنَ الْحَقِّ إِذَا فَعَلَ أَحَدُكُمْ فَلْيَتَوَضَّأْ وَلَا تَأْتُوا النِّسَاءَ فِي أَعْجَازِهِنَّ وَقَالَ مَرَّةً فِي أَدْبَارِهِنَّ
Narrated from Sayyiduna Ali bin Taliq (may Allah be pleased with him): A Bedouin came to the Noble Prophet (peace and blessings be upon him) and said: O Messenger of Allah! We live in the desert and sometimes one of us passes wind. The Prophet (peace and blessings be upon him) said: Allah does not shy away from the truth. When this happens to someone, he should perform ablution, and do not approach women from behind.