The special duaa for the imaam and the muazzin

عن أبى هريرة رضي الله عنه قال قال رسول الله صلى الله عليه وسلم الإمام ضامن والمؤذن مؤتمن اللهم أرشد الأئمة واغفر للمؤذنين. رواه ابو داود (الترغيب والترهيب 1/244)

Hazrat Abu Hurayrah (Radhiallahu Anhu) reports that Rasulullah (Sallallahu Alaihi Wasallam) said: “The Imaam is responsible (for the salaah of the entire congregation) and the muazzin is one who is entrusted with a trust (he has been entrusted with the duty of calling out the azaan on its prescribed time). O Allah, guide the Imaams (towards fulfilling their obligation of leading the salaah correctly) and forgive the muazzins (for their shortcomings).”