It was narrated that Ibn 'Abbas said:
"The Messenger of Allah said: 'Let the best of you give the call to prayer (Adhan), and let those who are most versed in the Qur'an lead you in prayer.'"

حَدَّثَنَا عُثْمَانُ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا حُسَيْنُ بْنُ عِيسَى، أَخُو سُلَيْمٍ الْقَارِي عَنِ الْحَكَمِ بْنِ أَبَانَ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، قَالَ قَالَ رَسُولُ اللَّهِ ﷺ " لِيُؤَذِّنْ لَكُمْ خِيَارُكُمْ وَلْيَؤُمَّكُمْ قُرَّاؤُكُمْ " .