Musannaf Ibn Abi Shaybah 12065 — Supplicating for the deceased after

Umayr bin Sa'id said: I prayed the funeral prayer of Yazid bin al-Mukaffaf with Sayyiduna Ali (may Allah be pleased with him). He said four takbirs over him, then he walked with the funeral, and when he came to the grave he supplicated thus: 'Allahumma 'abduka wa ibnu 'abdika nazala bika al-yawm, faghfir lahu dhanbahu, wa wassi' 'alayhi mudkhalahu, fa-inna la na'lamu illa khayran wa anta a'lamu bihi' (O Allah! Your servant and the son of Your servant has come to You today, so forgive his sins and make his grave spacious for him. We know nothing of him but good, and You know him better).