Surah Yusuf, ayah 2

إِنَّآ أَنزَلۡنَٰهُ قُرۡءَٰنًا عَرَبِيّٗا لَّعَلَّكُمۡ تَعۡقِلُونَ ٢

Innā anzalnāhu qur'ānan 'arabiyyal la'allakum ta'qilūn

Indeed, We have sent it down as an Arabic Qur’ān⁵⁸³ that you might understand.