Surah An-Nahl, ayah 64

16:64

وَمَآ أَنزَلۡنَا عَلَيۡكَ ٱلۡكِتَٰبَ إِلَّا لِتُبَيِّنَ لَهُمُ ٱلَّذِي ٱخۡتَلَفُواْ فِيهِ وَهُدٗى وَرَحۡمَةٗ لِّقَوۡمٖ يُؤۡمِنُونَ ٦٤

Wamā anzalnā 'alaykal-kitāba illā litubayyina lahumul-ladhikhtalafū fīhi wahudan warahmatal liqawmin yu'minūn

And We have not revealed to you the Book, [O Muḥammad], except for you to make clear to them that wherein they have differed and as guidance and mercy for a people who believe.