7.158 . Say ( O Muhammad ) : O mankind! Lo! I am the messenger of Allah to you all ( the messenger of ) Him unto whom belongeth the Sovereignty of the heavens and the earth . There is no God save Him . He quickeneth and He giveth death . So believe in Allah and His messenger , the Prophet who can neither read nor write , who believeth in Allah and in His words and follow him that haply ye may be led aright .