We have indeed, sent down to you the Koran, a (clear) sending, 23 So submit patiently to thy Lord's command, and obey not of them any guilty one or disbeliever. 24 And remember the name of your Lord morning and evening. 25 And during the night prostrate to Him and exalt Him a long [part of the] night. 26 As to these, they love the fleeting life, and put away behind them a Day (that will be) hard. 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 And ye will not, unless Allah willeth. Verily Allah is ever Knowing, Wise. 30 He admits to His Mercy whomsoever He pleases. As for the wrong-doers, He has prepared for them a grievous chastisement. 31