Musnad Ahmad 307:18

Abu Kamil narrated to us, Hammad—meaning Ibn Salamah—narrated to us, from Thabit, from Sulayman, the freed slave of Al-Hasan ibn Ali, from Abdullah ibn Abi Talhah, from his father, that the Messenger of Allah (peace and blessings of Allah be upon him) came one day, and happiness was visible on his face. They said: "O Messenger of Allah, we see happiness on your face." He said: "Indeed, an angel came to me and said: 'O Muhammad, does it not please you that your Lord, the Mighty and Majestic, says: No one from your nation sends blessings upon you except that I send blessings upon him tenfold, and no one from your nation sends peace upon you except that I send peace upon him tenfold?' I said: 'Yes.'"