And when he attained his full strength and became firm, We vouchsafed unto him wisdom and knowledge; and thus We reward the well-doers. 14 He entered the city unnoticed by its people, and there he encountered two men fighting with one another -- one of his own people and the other one of his enemies. The one who belonged to his own people cried out to him for help against his foe -- whereupon Moses struck him down with his fist, thereby causing his death. Moses said, "This is Satan's doing; he is an open foe, leading man astray." 15 He said: my Lord! verily I have wronged my soul, so wherefore forgive me. So He forgave him. Verily He! He is the Forgiving, the Owner of Mercy. 16 He said: 'My Lord as You have favored me, I will never be a helper to the wrongdoer' 17 The next morning, when he was walking in the city, apprehensive, and watchful, and the man who had sought his help the day before cried out to him again for help. Moses said to him, "You are clearly a misguided man." 18 When he wanted to catch the one who was an enemy to them both, the man said, "Moses, do you want to kill me just as you killed a man yesterday? You only want to become a tyrant in the land; you do not want to set things right." 19 And a man came from the uttermost part of the city, running. He said: O Moses! Lo! the chiefs take counsel against thee to slay thee; therefor escape. Lo! I am of those who give thee good advice. 20 So he left, fearful and vigilant, saying: 'My Lord, save me from the harmdoing nation' 21