Musannaf Ibn Abi Shaybah 31757 — What a man says in supplication when

Abu Hamzah said that al-Hasan said: When you hear the caller to prayer saying: "The prayer has indeed been established," then supplicate thus: "O Allah, Lord of this complete call and of the prayer that is being established, grant Muhammad (peace and blessings be upon him) his request on the Day of Resurrection." No man says this supplication when the caller stands except that Allah will admit that man into the intercession of Muhammad (peace and blessings be upon him) on the Day of Resurrection.