Sunan Ibn Majah 658
سنن ابن ماجه#658SahihIt was narrated that Abu Hurairah said:"I saw the Prophet carrying Hasan bin 'Ali on his shoulder, and his saliva was dripping down on him
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Zubair Ali ZaiIsnaad Sahih
In-book reference: 1:392