﴿ وَمَآ أَنزَلْنَا عَلَيْكَ ٱلْكِتَٰبَ إِلَّا لِتُبَيِّنَ لَهُمُ ٱلَّذِى ٱخْتَلَفُوا۟ فِيهِ ۙ وَهُدًۭى وَرَحْمَةًۭ لِّقَوْمٍۢ يُؤْمِنُونَ ﴾

“And upon thee [too] have We bestowed from on' high this divine writ for no other reason than that thou might make clear unto them all [questions of faith] on which they have come to hold divergent views, and [thus offer] guidance and grace unto people who will believe.”

And We have not revealed to you O Muhammad (s) the Book the Qur’ān except for the purpose that you may make clear to them to mankind that wherein they differ in the matter of religion and as a guidance wa-hudan is a supplement to wa-li-tubayyina ‘and that you may make clear’ and as a mercy for a people who believe in it.