سورة Az-Zumar ( The Groups ) - الآية 23

God has sent down the fairest discourse as a Book, consimilar in its oft-repeated, whereat shiver the skins of those who fear their Lord; then their skins and their hearts soften to the remembrance of God. That is God's guidance, whereby. He guides whomsoever He will; and whomsoever God leads astray, no guide has he.