فصّلت — Fussilat Ayat 44
وَلَوْ جَعَلْنٰهُ قُرْاٰنًا اَعْجَمِيًّا لَّقَالُوْا لَوْلَا فُصِّلَتْ اٰيٰتُهٗ ۗ ءَاَ۬عْجَمِيٌّ وَّعَرَبِيٌّ ۗ قُلْ هُوَ لِلَّذِيْنَ اٰمَنُوْا هُدًى وَّشِفَاۤءٌ ۗوَالَّذِيْنَ لَا يُؤْمِنُوْنَ فِيْٓ اٰذَانِهِمْ وَقْرٌ وَّهُوَ عَلَيْهِمْ عَمًىۗ اُولٰۤىِٕكَ يُنَادَوْنَ مِنْ مَّكَانٍۢ بَعِيْدٍ ࣖ
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."