Musnad Abi Ya'la 640 — he said: I heard Sayyiduna Umar saying

It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that he said: I heard Sayyiduna Umar (may Allah be pleased with him) saying to Sayyiduna Talhah bin Ubaydullah (may Allah be pleased with him): "What is the reason that, since the passing of the Messenger of Allah (peace and blessings be upon him), I see you so dishevelled and covered in dust? Perhaps you have some grievance about the leadership of your cousin?" He said that Sayyiduna Talhah (may Allah be pleased with him) replied: "I seek refuge with Allah! (It is not that at all.) Rather, the truth is that I heard the Messenger of Allah (peace and blessings be upon him) saying: 'I know a word which no man says at the time of his death except that it will be a source of comfort and relief for his soul until it leaves (his body), and it will be a light for him on the Day of Resurrection.' But I was not able to ask the Messenger of Allah (peace and blessings be upon him) about it, nor did he (peace and blessings be upon him) tell me about it; so this is what has brought me to this state." Sayyiduna Umar (may Allah be pleased with him) said: "I know that word." He said: "All praise belongs to Allah alone; so what is that word?" Sayyiduna Umar (may Allah be pleased with him) said: "It is the very word which the Messenger of Allah (peace and blessings be upon him) put to his uncle." Sayyiduna Talhah (may Allah be pleased with him) said: "You have spoken the truth."