It is We Who have sent down the Qur'an to thee by stages. 23 Therefore wait patiently for the command of your Lord, and obey not from among them a sinner or an ungrateful one. 24 and glorify your Lord morning and evening; 25 And during the night - worship Him; and hallow Him the livelong night. 26 Surely these love the transitory and neglect a grievous day before them. 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 indeed an advice; so whoever wishes may take the path towards his Lord. 29 But you will not unless God wills; surely God is ever All-knowing, All-wise. 30 He is Merciful to whom He will; but, for the harmdoers He has prepared for them a painful punishment. 31