Al-Jumu'ah · 62:2

2. He is the One Who sent amongst the Arabs, who could neither read nor write, a messenger from their own kind, reciting to them His verses, which He revealed to him, purifying them from disbelief and bad morals, teaching them the Qur’ān and teaching them the Sunnah. Prior to his being sent to them they were clearly misguided from the truth, as they used to worship idols, spill blood and sever family ties.