Allah's Messenger (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."
Reference: Sahih al-Bukhari 5630 In-book : Book 74, Hadith 56 USC-MSA web (English) : Vol. 7, Book 69, Hadith 534 (deprecated)
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