﴿ 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 revealed the Scripture unto thee) We did send Gabriel to you with the Qur'an (only that thou mayst explain unto them that wherein) in Religion (they differ) they opposed, (and (as) a guidance) from error (and a mercy) from chastisement (for a people who believe) in it.