Mishkat al-Masabih
Ibn ‘Abbas reported God’s Messenger as saying, “Let the best among you call the adhan for you, and the Qur’an readers act as your imams.” Abu Dawud transmitted it.
عَنِ ابْنِ عَبَّاسٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لِيُؤَذِّنْ لَكُمْ خِيَارُكُمْ وليؤمكم قراؤكم» . رَوَاهُ أَبُو دَاوُد
Reference