Musannaf Ibn Abi Shayba 33:1207

Husayn ibn Ali narrated to us, from Isma'il ibn Shu'ayb, who said: My father was a companion of Rabi' ibn Abi Rashid to Makkah. He said one day: "If I knew the most beloved of deeds to my Lord, I would perhaps exert myself for it." He said: So he saw in his dream: gratitude and remembrance.