Musnad Abu Ya'la al-Mawsili 4:14

Harun ibn Ishaq narrated to us, Muhammad ibn Abd al-Wahhab al-Qannad narrated to me, from Mis'ar, from Isma'il ibn Abi Khalid, from al-Sha'bi, from Yahya ibn Talhah, from his mother, Sa'da al-Murriyyah, who said: Umar passed by Talhah after the death of the Messenger of Allah, may Allah bless him and grant him peace, and said: "What is the matter with me that I see you depressed? Does the leadership of your cousin grieve you?" He said: "No, but I heard the Messenger of Allah, may Allah bless him and grant him peace, say: 'I surely know a word; no one says it at the time of his death except that it is a light for his record, and his body and his soul find comfort in it at the time of death.'" He said: "I know it. It is that which he desired for his uncle, and had he known anything that would save him more than it, he would have commanded him to it."