The Prophet ﷺ forbade breathing into a vessel, touching one's private parts with the right hand, or cleaning oneself after relieving oneself with the right hand.
حدثنا عبد الوهاب الثقفي عن أيوب عن يحيى بن أبي كثير
أن النبي ﷺ نهى أن يتنفس في الإناء أو يمس ذكره بيمينه أو يستطيب بيمينه
Its isnad is sahih. Abdul-Wahhab Thaqafi is Ibn Abdul-Majid, a trustworthy narrator whose hadiths are found in the collections of the group, and he has appeared repeatedly and is well known. The hadith has already appeared at 11479.