"When any one of you drinks, let him not breathe into the vessel, and when he goes to the toilet let him not touch his penis with his right hand, nor wipe himself with this right hand." (Using translation from Nasāʾī 47)
أَنَّ رَسُولَ اللهِ ﷺ قَالَ إِذَا أَتَى أَحَدُكُمُ الْخَلَاءَ فَلَا يَتَمَسَّحَنَّ بِيَمِينِهِ وَإِذَا شَرِبَ فَلَا يَتَنَفَّسْ فِي إِنَائِهِ