Hadith #392 (Sunan Ibn Majah)
Book: The Book of Purification and its Sunnah
Narrator(s): Aabad bin al-Walid bin Khalid عباد بن الوليد بن خالد الغبري, Alqama bin Abi Jmrh علقمة بن أبي جمرة, ibn Abbas, Mthr Btshdyd al-Ha'a al-Mftwhh مطهر بتشديد الهاء المفتوحة

“I saw the Prophet carrying Hasan bin ‘Ali on his shoulder, and his saliva was dripping down on him.”

Source: https://parallelquran.com/hadith/sunan-ibn-majah-392/