﴿ إِنَّآ أَنزَلْنَٰهُ قُرْءَٰنًا عَرَبِيًّۭا لَّعَلَّكُمْ تَعْقِلُونَ ﴾

“behold, We have bestowed it from on high as a discourse in the Arabic tongue, so that you might encompass it with your reason.”

(Lo! We have revealed it, a Lecture in Arabic) He says: We have sent down Gabriel with the Qur'an to Muhammad in accordance with the usage of the Arabic language, (that ye may understand) that which you were commanded to do and that in which you were prohibited from engaging.