Allah then mentions his blessings on them, saying: (Allah verily hath shown grace to the believers by sending unto them a messenger) of the Children of Adam whose lineage is well known (of their own) an Arab, like them, from the tribe of the Quraysh (who reciteth unto them His revelations) the Qur'an containing commands and prohibitions, (and causeth them to grow) he purifies them by means of the attestation of Allah's divine Oneness from idolatry as well as by cleansing them from their sins, (and teacheth them the Scripture) the Qur'an (and wisdom) the lawful and the prohibited; (although before) the advent of Muhammad and the Qur'an (they were in flagrant error) they were adherents of disbelief.