Musannaf Ibn Abi Shaybah 37127 — Reports from our Prophet

Harun bin Abi Waki' narrates from his father that he said: When this verse, 'This day I have perfected your religion for you' [Al-Ma'idah: 3], was revealed, the narrator says, it was the day of the Greater Hajj. He says: Sayyiduna Umar (may Allah be pleased with him) wept. The Messenger of Allah (peace and blessings be upon him) asked Sayyiduna Umar (may Allah be pleased with him): "What makes you weep?" Sayyiduna Umar (may Allah be pleased with him) said: "O Messenger of Allah (peace and blessings be upon him)! What has made me weep is that we used to be (hopeful) of increase in our religion. But now that this religion has been perfected, the fact is that whenever anything is perfected, deficiency begins to enter it." He (peace and blessings be upon him) said: "You have spoken the truth."