Surely We Ourselves have revealed the Quran to you revealing (it) in portions. 23 So persevere with the command of your Lord and do not pay any heed to the wicked and the unbelieving, 24 And remember thou the name of thy Lord in the morning and in the evening. 25 And during the night prostrate to Him and exalt Him a long [part of the] night. 26 Those people [who are unmindful of God] aspire for immediate gains, and put behind them a Heavy 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 This is an admonition: Whosoever will, let him take a (straight) Path to his Lord. 29 But you will not desire except as God wills. Verily He is all-knowing and all-wise. 30 He admits to His Mercy whomsoever He pleases. As for the wrong-doers, He has prepared for them a grievous chastisement. 31