Surah Az-Zumar · 23
اللَّهُ نَزَّلَ أَحسَنَ الحَديثِ كِتٰبًا مُتَشٰبِهًا مَثانِىَ تَقشَعِرُّ مِنهُ جُلودُ الَّذينَ يَخشَونَ رَبَّهُم ثُمَّ تَلينُ جُلودُهُم وَقُلوبُهُم إِلىٰ ذِكرِ اللَّهِ ۚ ذٰلِكَ هُدَى اللَّهِ يَهدى بِهِ مَن يَشاءُ ۚ وَمَن يُضلِلِ اللَّهُ فَما لَهُ مِن هادٍ
Allah has sent down the best statement: a consistent Book wherein is reiteration. The skins shiver therefrom of those who fear their Lord; then their skins and their hearts relax at the remembrance of Allah. That is the guidance of Allah by which He guides whom He wills. And one whom Allah leaves astray - for him there is no guide