(20) باب فِي النَّفْخِ فِي الشَّرَابِ وَالتَّنَفُّسِ فِيهِ
Narrated Abdullah ibn Abbas:
The Messenger of Allah (ﷺ) forbade blowing or breathing into a vessel.
Reference: Sunan Abi Dawud 3728
In-book reference: Book 27, Hadith 60
English translation: Book 26, Hadith 3719