(16) باب كَرَاهَةِ التَّنَفُّسِ فِي نَفْسِ الإِنَاءِ وَاسْتِحْبَابِ التَّنَفُّسِ ثَلاَثًا خَارِجَ الإِنَاءِ
Anas reported that Allah's Messenger (ﷺ) breathed three times (outside the vessel) in the course of a drink and said:
It is more thirst- quenching, healthier and more wholesome. Anas said: So I also breathe three times in the course of a drink.
Reference: Sahih Muslim 2028 b
In-book reference: Book 36, Hadith 161
USC-MSA web (English) reference(deprecated numbering scheme): Book 23, Hadith 5030