Yusuf 12:2

إِنَّآ أَنزَلْنَـٰهُ قُرْءَٰنًا عَرَبِيًّا لَّعَلَّكُمْ تَعْقِلُونَ

Inna anzalnahu qur-ananAAarabiyyan laAAallakum taAAqiloon

Indeed, We have sent it down as an Arabic Qur’ān that you might understand.

We have sent it down, as an Arabic Qur’an, so that you may understand.