Musannaf Ibn Abi Shayba 21:652

Abu al-Ahwas narrated to us, from Abu Hamza, from al-Hasan, who said: When you hear the muezzin say, "The prayer has been established" (qad qamat al-salah), say: "O Allah, Lord of this perfect call and the established prayer, grant Muhammad, may Allah bless him and grant him peace, his request on the Day of Resurrection." No man says it when the muezzin stands without Allah admitting him into Paradise through the intercession of Muhammad, may Allah bless him and grant him peace, on the Day of Resurrection.