The imam is responsible and the mu'adhdhin is trusted, O Allah, guide the imams and forgive the mu'adhdhins. (Using translation from Abū Dāʾūd 517)
قَالَ رَسُولُ اللهِ ﷺ «الْإِمَامُ ضَامِنٌ وَالْمُؤَذِّنُ مُؤْتَمَنٌ اللهُمَّ اغْفِرْ لِلْمُؤَذِّنِينَ وَاهْدِ الْأَئِمَّةَ»