Sahih Muslim — Hadith #2125

And we talked about the firstborn, and 'Uthman, my father's son Shaybah, and I talked about the critic' Umar. They all said, We talked about Abu Khalid al-Ahmar, about Zayd ibn Kisan, about a determined father, about my father Hurayrah. The Messenger of Allah (peace and blessings of Allah be upon him) said, "Teach your dead, for there is no god but Allah."