عَنْ أَبِي قَتَادَةَ رَضِيَ اللَّهُ عَنْهُ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ إِذَا شَرِبَ أَحَدُكُمْ فَلَا يَتَنَفَّسْ فِي الْإِنَاءِ وَإِذَا دَخَلَ الْخَلَاءَ فَلَا يَتَمَسَّحْ بِيَمِينِهِ وَإِذَا بَالَ فَلَا يَمَسَّ ذَكَرَهُ بِيَمِينِهِ
Sayyiduna Abu Qatadah (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: When any of you drinks water, he should not breathe into the vessel; when he enters the toilet, he should not clean himself with his right hand; and when he urinates, he should not touch his private part with his right hand.