The Prophet ﷺ said, "The muezzin is forgiven to the extent of his voice, and every moist and dry thing bears witness for him. The one who attends the prayer has twenty-five prayers recorded for him, and what is between the two prayers is expiated for him."
عن النبي ﷺ، قال: المؤذن يغفر له مدى صوته، ويشهد له كل رطب ويابس، وشاهد الصلاة يكتب له خمس وعشرون صلاة، ويكفر عنه ما بينهما.
Reported by Abu Dawud (515), and this is his wording, and Nasai (645) and Ibn Majah (724), all of them through the route of Shubah, from Musa bin Abu Uthman, from Abu Yahya, from Abu Hurairah, who then narrated the hadith. Its isnad is hasan because of Musa bin Abu Uthman al-Kufi al-Madani al-Tabban. Sufyan said, "He was a teacher and an excellent shaykh." Ibn Hibban mentioned him in al-Thiqat (7/454), saying, "He is among the leading figures and worshippers of the people of Kufa." The discussion of him is set out in detail in the book on prayer.