Hadith 6:1138
Hushaym narrated to us, I was informed by Ash'ath, from al-Sha'bi, who said: Qarazah ibn Ka'b came with a group from Egypt, and Ali ibn Hunayf had already been prayed over and buried. So Ali commanded him and his companions to pray over the grave, and they did so.
حدثنا هشيم انا أشعث عن الشعبي قال جاء قرظة بن كعب في رهط مصر وقد صلى علي على بن حنيف ودفن فأمره علي ان يصلي هو وأصحابه على القبر ففعل