16:64
وَمَآ أَنزَلْنَا عَلَيْكَ ٱلْكِتَـٰبَ إِلَّا لِتُبَيِّنَ لَهُمُ ٱلَّذِى ٱخْتَلَفُوا۟ فِيهِ ۙ وَهُدًى وَرَحْمَةً لِّقَوْمٍ يُؤْمِنُونَ
wamā anzalnā ʿalayka l-kitāba illā litubayyina lahumu alladhī ikh'talafū fīhi wahudan waraḥmatan liqawmin yu'minūna
We have sent down the Scripture to you only to make clear to them what they differ about, and as guidance and mercy to those who believe.
And We have not sent down the Book (the Qur’an) to you (O Muhammad صلى الله عليه و سلم), except that you may explain clearly unto them those things in which they differ, and (as) a guidance and a mercy for a folk who believe.