سورة Az-Zumar ( The Groups ) - الآية 23

Allah has sent down the best of Books (the Holy Qur’an), which is consistent throughout, the one with paired statements; the hairs on the skins of those who fear their Lord, stand on end with it; then their skins and their hearts soften, inclined towards the remembrance of Allah; this is the guidance of Allah, He may guide whomever He wills with it; and whomever Allah sends astray, there is no guide for him.