Qasim bin Muhammad says that once Hazrat Abu Hurairah (may Allah be pleased with him) and Ka'b Ahbar (may Allah have mercy on him) were together. Hazrat Abu Hurairah (may Allah be pleased with him) would narrate the sayings of the Prophet Muhammad (peace and blessings be upon him) to Ka'b, and Ka'b would narrate to Hazrat Abu Hurairah (may Allah be pleased with him) the matters from the previous heavenly books. During this, Hazrat Abu Hurairah (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: Every prophet has a supplication that is certainly accepted, and I have reserved my supplication for the intercession of my ummah on the Day of Resurrection.