Sunan Abi Dawud — The Office of the Judge (Kitab Al-Aqdiyah) — Hadith No: 3622

Narrated AbuHurayrah: The Prophet (ﷺ) said: The mu'adhdhin will receive forgiveness to the extent to which his voice reaches, and every moist and dry place will testify on his behalf; and he who attends (the congregation of) prayer will have twenty-five prayers recorded for him and will have expiation for sins committed between every two times of prayer

Jabir b. ‘Abd Allah reported the Messenger of Allah (ﷺ) as saying:if anyone says when he hears the call to prayer : “O Allah, Lord of this perfect call and of the prayer which is established for all time, grant Muhammad the wasilah and excellency, and raise him up in a praiseworthy position which Thou hast promised, he will be assured of my intercession

Narrated Abdullah ibn Zayd: The Prophet (ﷺ) intended to do many things for calling (the people) to prayer, but he did not do any of them. Then Abdullah ibn Zayd was taught in a dream how to pronounce the call to prayer. He came to the Prophet (ﷺ) and informed him. He said: Teach it to Bilal. He then taught him, and Bilal made a call to prayer. Abdullah said: I saw it in a dream and I wished to pronounce it, but he (the Prophet) said: You should pronounce iqamah

Anas reported :the Iqamah was pronounced (for the night prayer) and the Messenger of Allah (ﷺ) remained engaged in talking (to a person) in the corner of the mosque. He did not begin prayer until the people slept