Musannaf Ibn Abi Shayba 3:3666

Waki’ narrated to us, from Sufyan, from Jabir, from ‘Amir, who said: I said to him: "A man passes by this verse in prayer: 'Indeed, Allah and His angels send blessings upon the Prophet' (33:56). Should he send blessings upon him?" He said: "He passes [by it]."