Musnad Ahmad 516:1

Ibrahim ibn Ishaq narrated to us, Abdullah ibn al-Mubarak narrated to us, from Yahya ibn Hassan—from the people of Jerusalem, and he was an old man of good understanding—from Rabi'ah ibn 'Amir, who said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "Adhere to [the invocation]: 'O Possessor of Majesty and Honor' (Ya Dhal-Jalali wal-Ikram)."