Abu Huraira reported God’s Messenger as saying, “The imam is responsible and the mu'adhdhin is trusted. O God, guide the imams and forgive the mu'adhdhins.”
Ahmad, Abu Dawud, Tirmidhi and Shafi’i transmitted it, and in another version by Shafi’i the wording of al-Masabih is used.
‘Abdallah b. Mughaffal reported God’s Messenger as saying, “Between every pair of adhans there is a prayer; between every pair of adhans there is a prayer.” Then he said on repeating it a third time, “for him who wishes.”
Ibn ‘Abbas reported God’s Messenger as saying, “If anyone makes the call to prayer for seven years seeking to please God, freedom from hell will be recorded for him.”
Narrated Sa‘d b. Abu Waqqas reported God’s Messenger as saying:
If anyone says when he hears the mu’adhdhin, “I testify that there is no god but God alone who has no partner and that Muhammad is His servant and Messenger; I am satisfied with God as Lord, with Muhammad as Messenger, and with Islam as religion,” his sins will be forgiven him.