Ash-Shuraa 42:52

وَكَذَٰلِكَ أَوۡحَيۡنَآ إِلَيۡكَ رُوحٗا مِّنۡ أَمۡرِنَاۚ مَا كُنتَ تَدۡرِي مَا ٱلۡكِتَٰبُ وَلَا ٱلۡإِيمَٰنُ وَلَٰكِن جَعَلۡنَٰهُ نُورٗا نَّهۡدِي بِهِۦ مَن نَّشَآءُ مِنۡ عِبَادِنَاۚ وَإِنَّكَ لَتَهۡدِيٓ إِلَىٰ صِرَٰطٖ مُّسۡتَقِيمٖ 52

And thus We have revealed to you an inspiration of Our command. 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 Muhammad], you guide to a straight path