Sunan Abi Dawud 3728
سنن أبي داود#3728SahihNarrated Abdullah ibn Abbas: The Messenger of Allah (ﷺ) forbade blowing or breathing into a vessel
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautHasan Sahih
Zubair Ali ZaiIsnaad Sahih
In-book reference: 27:60