Musannaf Ibn Abi Shaybah 34106 — Reports on Abu Bakr al-Siddiq

Abd al-Aziz bin Siyah (may Allah have mercy on him) said that Habib bin Abi Thabit (may Allah have mercy on him) said concerning the saying of Allah, Lord of Glory, "So Allah sent down His tranquility upon him" [Al-Tawbah: 40]: "It refers to Sayyiduna Abu Bakr (may Allah be pleased with him)." He said: "As for the Prophet (peace and blessings be upon him), tranquility and mercy were already upon him before that."