Sunan At-Tirmidhi

Narrated Abu Sa’id Al Khudri : That the Prophet (ﷺ) prohibited blowing into the drink. A man said: ""What about if one sees something floating in the vessel?"" He said: ""Spill it out (removing that)."" He said: ""I can not drink in one breath."" He said: ""Then remove the cup away from your mouth."" [Abu 'Eisa said:] This Hadith is Hasan Sahih