Abu Qatadah (RA) reported it from his father: The Messenger of Allah (ﷺ) said: None of you should hold penis with his right hand while urinating, or wipe himself with his right hand in privy and should not breathe into the vessel (from which he drinks).
Hadith Referenceصحيح مسلم / كتاب الطهارة / 267
Hadith Gradingمحدثین:أحاديث صحيح مسلم كلها صحيحة
Hadith Takhrij«أحاديث صحيح مسلم كلها صحيحة ، تقدم تخريجه فى الحديث السابق برقم (610)»
Abu Qatadah (RA) reported it from his father that the Messenger of Allah (ﷺ) said: When anyone amongst you enters the privy he should not touch his penis with his right hand.
Aba Qatada reported: The Messenger of Allah (ﷺ) forbade (us) to breathe into the vessel, to touch the penis with the right hand and to wipe after relieving with right hand.