Al-Amālī (al-Mufīd), no. 198

3. He said: Abul Hasan Ahmad ibn Muhammad ibnal-Hasan ibn al-Walid reported to me from his father, from Sa’d ibn Abdillah, from Ahmad ibn Muhammad ibn Isa, from Bakr ibn Swaleh, from al-Hasan ibn ‘Ali, from Abdullah ibn Ibrahim, who reported from al-Husayn ibn Zaid, from Ja’far ibn Muhammad, reporting from his father and his grandfather, peace be upon them, that: The Prophet, peace be upon him and his progeny, said: The night I was taken to the heavens, I ended up at Sidratul Muntaha, I heard: "O Muhammad, counsel (your people) good about ‘Ali, for he is the master of the Muslims, Imam of the people of Taqwa (those who guard themselves from all sins), and leader of the hopping horses with white spots on their foreheads (leading to the Paradise), on the Day of Judgement."