Has it not become clear to those who inherited the earth after its [previous] people that if We willed, We could afflict them for their sins? But We seal over their hearts so they do not hear. 100 We have told you the stories of those towns: their messengers came to them with clear signs, but they were never going to believe in something they had already rejected. Thus God seals up the hearts of those who deny the truth. 101 We found most of them untrue to their covenants, indeed We found most of them to be defiant. 102 Then We sent, after them, Musa with Our signs unto Fir'awn and his chiefs, but they wronged them. Behold that wise was the end of the corrupters! 103 And Musa said: O Firon! surely I am an apostle from the Lord of the worlds: 104 so constituted that I cannot say anything about God but the truth. I have now come unto you with a clear evidence from your Sustainer: let, then, the children of Israel go with me!" 105 Pharaoh said: if you have brought a sign, then bring it forth if you are truthful.' 106 Thereupon [Moses] threw down his staff, and lo! it was a serpent, plainly visible; 107 And putting his hand in his bosom, withdrew it – so it shone brightly before the beholders. 108