As Muhammad said, "Guide the imams aright, and forgive the muezzins."
قال وكذا حدثناه أسود قال حدثنا شريك عن الأعمش عن أبي صالح
كما قال محمد أرشد الأئمة واغفر للمؤذنين
Its isnad is sahih through its various routes. It has already appeared at 8949, and see also 7169 and 7805.