And never think that Allah is unaware of what the wrongdoers do. He only delays them for a Day when eyes will stare [in horror]. 42 when they shall run with necks outstretched and heads erect, their glances never returned on themselves, their hearts void. 43 (O Muhammad), warn mankind of the Day when a severe chastisement shall overtake them, and the wrong-doers will say: "Our Lord, grant us respite for a short while; we shall respond to Your call and will follow Your Messengers." (But they will be clearly told): "Are you not the same who swore earlier that they shall never suffer decline?" 44 You lived in the dwellings of those who wronged themselves, and it was made clear to you how We had dealt with them and We gave you many examples. 45 They devised their devising, and their devising is known to God; though their devising were such as to remove mountains.' 46 Do not think that Allah will break the promise He gave to His Messengers. Mighty is Allah, and Vengeful. 47 (Do warn them of the) Day when the heavens and the earth shall be altogether changed; when all will appear fully exposed before Allah, the One, the Irresistible! 48 And you will see the criminals that Day bound together in shackles, 49 Of molten pitch shall be their garments, their faces covered with flames, 50 That Allah may requite each soul (according to) what it has earned; surely Allah is swift in reckoning. 51 This is a preaching for mankind, and that they may be warned thereby, and that they may know that there is only one God, and that the men of understanding may be admonished. 52