Musannaf Ibn Abi Shaybah 8871 — Sending blessings upon the Prophet

Sayyiduna Uqbah bin Amr (may Allah be pleased with him) said: Once a man came to the Prophet (peace and blessings be upon him), sat down in front of him and said: "O Messenger of Allah! We have learned how to send salam upon you; tell us about the salah (blessings): how should we send salah upon you?" He remained silent for a while, until we wished that he had not asked about it. Then he said: "When you send salah upon me, say: 'O Allah, send Your mercy upon the unlettered Prophet Muhammad (peace and blessings be upon him) and upon his family, as You sent Your mercy upon Ibrahim and upon his family; and send Your blessings upon the unlettered Prophet Muhammad (peace and blessings be upon him) and upon his family, as You sent Your blessings upon Ibrahim and upon his family. Indeed, You are Praiseworthy, Glorious.'"