Dalil
العربية

Quran Az-Zumar 39:28

قُرۡءَانًا عَرَبِيًّا غَيۡرَ ذِي عِوَجٖ لَّعَلَّهُمۡ يَتَّقُونَ

Translation

[It is] an Arabic Qur’ān, without any deviance that they might become righteous.