Sending blessings upon the Prophet (peace and blessings be upon him): how it is done

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.'"

Something similar is narrated through another chain.

It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that we said: "O Messenger of Allah! We have learned how to send salam upon you; now teach us how to send salah (blessings) upon you as well." He said: "Say: 'O Allah! Send Your mercy upon Your servant and Messenger Muhammad (peace and blessings be upon him), as You sent Your mercy upon Ibrahim; and send Your blessings upon Muhammad (peace and blessings be upon him), as You sent Your blessings upon Ibrahim.'"

Sayyiduna Talhah (may Allah be pleased with him) said: We said: "O Messenger of Allah! We have learned the way of sending salam upon you; now teach us the way of sending salah (blessings) as well." 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.'"

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.'"

Al-Hasan said: The people said: "O Messenger of Allah! We have learned the way of sending salam upon you; now teach us the way of sending salah (blessings) as well." He said: "Say: 'O Allah! Place Your mercies and Your blessings upon the family of Muhammad (peace and blessings be upon him), as You placed them upon the family of Ibrahim. You are Praiseworthy, Glorious.'"