And verily We have displayed for mankind in this Qur'an all manner of similitudes, but man is more than anything contentious. 54 And nothing prevents men from believing when the guidance comes to them, and from asking forgiveness of their Lord, except that what happened to the ancients should overtake them, or that the chastisement should come face to face with them. 55 And We send not the Messengers except as giver of glad tidings and warners. But those who disbelieve, dispute with false argument, in order to refute the truth thereby. And they treat My Ayat (proofs, evidences, verses, lessons, signs, revelations, etc.), and that with which they are warned, as jest and mockery! 56 Who is more unjust than he who, on being reminded of his Lord's revelations, turns away from them, and forgets the evil deeds he had committed in the past. Verily We have placed a covering on their hearts so that they do not understand, and a deafness in their ears so that however you may call them to guidance they will never be guided aright. 57 But thy Lord is the All-forgiving, full of mercy. If He should take them to task for that they have earned, He would hasten for them the chastisement; but they have a tryst, from which they will find no escape. 58 And these towns (population, 'Ad, Thamud, etc.) We destroyed when they did wrong. And We appointed a fixed time for their destruction. 59