عَنْ عَمْرِو بْنِ سَلِمَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: كَانَتْ تَأْتِينَا الرُّكْبَانُ مِنْ قِبَلِ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ فَنَسْتَقْرِئُهُمْ فَيُحَدِّثُونَا أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ: ((لِيُؤُمَّكُمْ أَكْثَرُكُمْ قُرْآنًا))
Sayyiduna Amr bin Salamah (may Allah be pleased with him) says: Caravans used to come to us from the Messenger of Allah (peace and blessings be upon him), so we would learn from them. They also informed us that the Messenger (peace and blessings be upon him) said: The one who knows more of the Qur'an among you should lead your prayer.