Musannaf Ibn Abi Shaybah 8867 — Sending blessings upon the Prophet

Sayyiduna Ka'b bin Ujrah (may Allah be pleased with him) said: We said: "O Messenger of Allah! We have learned how to send salam upon you; so how should we send salah (blessings) upon you? Teach us this." He (peace and blessings be upon him) said: "Say these words: 'O Allah, send Your mercy upon Muhammad (peace and blessings be upon him) and upon his family, as You sent Your mercy upon Ibrahim and upon his family. Indeed, You are Praiseworthy, Glorious. O Allah, send Your blessings upon 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.'"