The Book of Drinks
36/16. Chapter:
It is disliked to breathe into the vessel, and it is recommended to take three breaths, outside the vessel
Sahih Muslim
حَدَّثَنَا ابْنُ أَبِي عُمَرَ، حَدَّثَنَا الثَّقَفِيُّ، عَنْ أَيُّوبَ، عَنْ يَحْيَى بْنِ أَبِي كَثِيرٍ، عَنْ عَبْدِ، اللَّهِ بْنِ أَبِي قَتَادَةَ عَنْ أَبِيهِ، أَنَّ النَّبِيَّ صلى الله عليه وسلم نَهَى أَنْ يُتَنَفَّسَ فِي الإِنَاءِ .
Abu Qatada reported on the authority of his father that Allah's Apostle (ﷺ) forbade breathing in a vessel.
Reference : Sahih Muslim 267dIn-book reference : Book 36, Hadith 159USC-MSA web (English) reference : Book 23, Hadith 5028