Sunan an-Nasa'i 645
سنن النسائي#645Sahihأَخْبَرَنَا إِسْمَاعِيلُ بْنُ مَسْعُودٍ، وَمُحَمَّدُ بْنُ عَبْدِ الأَعْلَى، قَالاَ حَدَّثَنَا يَزِيدُ، - يَعْنِي ابْنَ زُرَيْعٍ - قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ مُوسَى بْنِ أَبِي عُثْمَانَ، عَنْ أَبِي يَحْيَى، عَنْ أَبِي هُرَيْرَةَ، سَمِعَهُ مِنْ، فَمِ رَسُولِ اللَّهِ صلى الله عليه وسلم يَقُولُ " الْمُؤَذِّنُ يُغْفَرُ لَهُ بِمَدِّ صَوْتِهِ وَيَشْهَدُ لَهُ كُلُّ رَطْبٍ وَيَابِسٍ " .
It was narrated from Abu Hurairah, who heard it from the mouth of the Messenger of Allah (S.A.W):"The Mu'adhdhin will be forgiven as far as his voice reaches, and every wet and dry thing will bear witness for him
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 7:20