Verse 44

وَلَوْ جَعَلْنَـٰهُ قُرْءَانًا أَعْجَمِيًّا لَّقَالُوا۟ لَوْلَا فُصِّلَتْ ءَايَـٰتُهُۥٓ ءَا۬عْجَمِىٌّ وَعَرَبِىٌّ قُلْ هُوَ لِلَّذِينَ ءَامَنُوا۟ هُدًى وَشِفَآءٌ وَٱلَّذِينَ لَا يُؤْمِنُونَ فِىٓ ءَاذَانِهِمْ وَقْرٌ وَهُوَ عَلَيْهِمْ عَمًى أُو۟لَـٰٓئِكَ يُنَادَوْنَ مِن مَّكَانٍۭ بَعِيدٍ

Had We made it a Non-Arabic Quran, they would have surely said, its verses are not elucidated. Be it Non-Arab as well as Arab, say, for those who are faithful, it is a guide and a healing. As for those who have no faith, there is deafness in their ears and they are blind. It is as though they are being called from a far away place.