Narrated Abdullah ibn Abbas: Let the best among you call the adhan for you, and the Quran-readers act as your imams.
Related hadith on this topic
Explanation & Benefits
Shaykh Umar Farooq Saeedi
590. Commentary:
The imam being a hafiz (one who has memorized the Qur'an), a scholar, and a dignified person is extremely effective in the matter of enjoining good and forbidding evil (amr bil ma'ruf wa nahi 'anil munkar); people readily accept their words.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 590