They who turn (to Allah), who serve (Him), who praise (Him), who fast, who bow down, who prostrate themselves, who enjoin what is good and forbid what is evil, and who keep the limits of Allah; and give good news to the believers.

For his sake there are angels following one another, before him and behind him, who guard him by Allah's commandment; surely Allah does not change the condition of a people until they change their own condition; and when Allah intends evil to a people, there is no averting it, and besides Him they have no protector.

So He ordained them seven heavens in two periods, and revealed in every heaven its affair; and We adorned the lower heaven with brilliant stars and (made it) to guard; that is the decree of the Mighty, the Knowing.