Surah Fussilat
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
Wa lau ja‘alnāhu qur'ānan a‘jamiyyal laqālū lau lā fuṣṣilat āyātuh(ū), a'a‘jamiyyuw wa ‘arabiyy(un), qul huwa lil-lażīna āmanū hudaw wa syifā'(un), wal-lażīna lā yu'minūna fī āżānihim waqruw wa huwa ‘alaihim ‘amā(n), ulā'ika yunādauna mim makānim ba‘īd(in).
And if We had made it a non-Arabic Qur'an, they would have said, "Why are its verses not explained in detail [in our language]? Is it a foreign [recitation] and an Arab [messenger]?" Say, "It is, for those who believe, a guidance and cure." And those who do not believe - in their ears is deafness, and it is upon them blindness. Those are being called from a distant place.
📝 Footnotes
673) They do not see anything in the Qur’an except the tribulations and distortions that they are intentionally seeking.