Messenger of Allah ﷺ said, "When you drink (water), do not breath in the vessel; and when you urinate, do not touch your penis with your right hand. And when you cleanse yourself after defecation, do not use your right hand." (Using translation from Bukhārī 5630)
قَالَ رَسُولُ اللهِ ﷺ إِذَا شَرِبَ أَحَدُكُمْ فَلَا يَتَنَفَّسْ فِي الْإِنَاءِ وَإِذَا بَالَ أَحَدُكُمْ فَلَا يَمَسَّ ذَكَرَهُ بِيَمِينِهِ وَإِذَا تَمَسَّحَ أَحَدُكُمْ مِنَ الْخَلَاءِ فَلَا يَتَمَسَّحَنَّ بِيَمِينِهِ