Musannaf Ibn Abi Shaybah 31320 — How supplication is opened

Sayyiduna Salamah bin al-Akwa' (may Allah be pleased with him) said: I never heard the Messenger of Allah (peace and blessings be upon him) begin a supplication except that he (peace and blessings be upon him) began it with these words: "Glorified is my Lord, the Most Exalted, the Most High, the Giver of everything."