Sunan Abu Dawud
515
Sahih+3

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

SahihAl-Albani
SahihMuhammad Muhyi Al-Din Abdul Hamid