Jami` at-Tirmidhi 1889
جامع الترمذي#1889SahihNarrated 'Abdullah bin Abi Qatadah: From his father, that the Messenger of Allah (ﷺ) said: "When one of you drinks, then do not breathe into the vessel." [Abu 'Eisa said:] This Hadith is Hasan Sahih
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 26:30