Amr bin Salamah Al-Jarmi said:"Riders used to pass by us and we would leam the Qur'an from them. My father came to the Prophet (ﷺ) and he said: 'Let the one of you who knows most Qur'an leads the prayer.' My father came and said that the Messenger of Allah (ﷺ) had said: 'Let the one of you who knows most Quran lead you in prayer.' They looked and found that I was the one who knew most Qur'an, so I used to lead them in prayer when I was eight years old

English translation · Sunan an-Nasa'i