Al-Jinn begins with a command to the Prophet ﷺ to report something astonishing that was revealed to him: a company of the jinn quietly listened to the Qur'an and were transformed by it. Their own words fill the first half of the surah. They call it an amazing Qur'an that guides to what is right, and on the strength of it they declare their faith and vow never again to associate anyone with their Lord. They testify to the pure oneness of Allah — that exalted is the nobleness of our Lord; He has not taken a wife or a son — and they confess how their own foolish ones had spread lies about Him and how men who sought refuge in jinn had only made matters worse. They describe the heaven they once eavesdropped upon, now filled with stern guards and burning flames since the Prophet's mission began, and they admit that they are of divided ways: among them are the righteous, and among them are others — the ones who submit seek right guidance, while the unjust are firewood for Hell.

The second half turns from the jinn's testimony to direct revelation. Steadfastness on the straight path is promised abundant provision, while turning away from the remembrance of one's Lord leads to arduous punishment. The mosques belong to Allah alone, so none is to be invoked beside Him — and when the servant of Allah stood calling upon Him, the jinn nearly pressed upon him in crowds to listen. A series of Say commands then defines the Prophet's role: he invokes only his Lord, he owns neither harm nor guidance for anyone, no one could shield him from Allah, and his task is only to convey. The surah closes on the majesty of divine knowledge: Allah alone knows the unseen and discloses it only to a messenger He chooses, guarded front and back, so that it may be known that the messengers conveyed their Lord's messages — and He has encompassed all that is with them and counted all things in number.