Ash-Shuraa 42:52

Wakathalika awhaynailayka roohan min amrina ma kunta tadree maalkitabu wala al-eemanu walakinjaAAalnahu nooran nahdee bihi man nashao min AAibadinawa-innaka latahdee ila siratin mustaqeem

And thus We have revealed to you an inspiration of Our command [i.e., the Qur’ān]. You did not know what is the Book or [what is] faith, but We have made it a light by which We guide whom We will of Our servants. And indeed, [O Muḥammad], you guide to a straight path -

In similar way, We have revealed to you a Spirit from Our command. You did not know earlier what was the Book or what was Īmān (true faith), but We have made it (the Qur’ān) a light with which We guide whomsoever We will from among Our servants. And indeed you are guiding (people) to a straight path,