Quran 17:82

O mankind! There has come to you an admonition from your Lord, a cure for what is in the hearts, and a guide and a blessing to true believers.
Say, "In the grace and mercy of God let them rejoice, for these are better than the worldly riches which they hoard." 10:57-58

Had We sent this as a Quran in a language other than Arabic, they would have said, "Why are its verses not clearly explained? What! An Arab Prophet, and a scripture in a foreign tongue?" Say, "It is a guide and a healing to those who believe; but for those who do not believe, there is a deafness in their ears, and a covering over their eyes: they are as it were  being called from a very distant place." 41:44


يَا أَيُّهَا النَّاسُ قَدْ جَاءَتْكُم مَّوْعِظَةٌ مِّن رَّبِّكُمْ وَشِفَاءٌ لِّمَا فِي الصُّدُورِ وَهُدًى وَرَحْمَةٌ لِّلْمُؤْمِنِينَ ١٠:٥٧
قُلْ بِفَضْلِ اللَّهِ وَبِرَحْمَتِهِ فَبِذَٰلِكَ فَلْيَفْرَحُوا هُوَ خَيْرٌ مِّمَّا يَجْمَعُونَ ١٠:٥٨
وَلَوْ جَعَلْنَاهُ قُرْآنًا أَعْجَمِيًّا لَّقَالُوا لَوْلَا فُصِّلَتْ آيَاتُهُ ۖ أَأَعْجَمِيٌّ وَعَرَبِيٌّ ۗ قُلْ هُوَ لِلَّذِينَ آمَنُوا هُدًى وَشِفَاءٌ ۖ وَالَّذِينَ لَا يُؤْمِنُونَ فِي آذَانِهِمْ وَقْرٌ وَهُوَ عَلَيْهِمْ عَمًى ۚ أُولَٰئِكَ يُنَادَوْنَ مِن مَّكَانٍ بَعِيدٍ ٤١:٤٤