﴿ وَلَوْ جَعَلْنَٰهُ قُرْءَانًا أَعْجَمِيًّۭا لَّقَالُوا۟ لَوْلَا فُصِّلَتْ ءَايَٰتُهُۥٓ ۖ ءَا۬عْجَمِىٌّۭ وَعَرَبِىٌّۭ ۗ قُلْ هُوَ لِلَّذِينَ ءَامَنُوا۟ هُدًۭى وَشِفَآءٌۭ ۖ وَٱلَّذِينَ لَا يُؤْمِنُونَ فِىٓ ءَاذَانِهِمْ وَقْرٌۭ وَهُوَ عَلَيْهِمْ عَمًى ۚ أُو۟لَٰٓئِكَ يُنَادَوْنَ مِن مَّكَانٍۭ بَعِيدٍۢ ﴾

“Now if We had willed this [divine writ] to be a discourse in a non-Arabic tongue, they [who now reject it] would surely have said, “Why is it that its messages have not been spelled out clearly? Why - [a message in] a non-Arabic tongue, and [its bearer] an Arab?” Say: “Unto all who have attained to faith, this [divine writ] is a guidance and a source of health; but as for those who will not believe - in their ears is deafness, and so it remains obscure to them: they are [like people who are] being called from too far away.”

Please check ayah 41:45 for complete tafsir.