We have indeed, sent down to you the Koran, a (clear) sending, 23 Therefore be patient with constancy to the Command of thy Lord, and hearken not to the sinner or the ingrate among them. 24 And, remember the Name of your Lord at the dawn and in the evening; 25 And during the night prostrate to Him and exalt Him a long [part of the] night. 26 Indeed, these [disbelievers] love the immediate and leave behind them a grave Day. 27 It was We who created them and made their constitution strong, but if We wish we can replace them with others like them. 28 Verily this is an Exhortation; so let him who so will take a way to his Lord. 29 Yet ye will not, unless Allah willeth. Lo! Allah is Knower, Wise. 30 He admits to His mercy whomever He wants. For the unjust He has prepared a painful punishment. 31