Az-Zumar 39:23

Allah has sent down the best message – a consistent Book of repeated lessons – causing the skins of those who fear their Lord to shiver, and then their skins and their hearts soften at the remembrance of Allah. This is the guidance of Allah by which He guides whom He wills. But whoever Allah causes to stray, there is none to guide him.

Allāh 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 [i.e., mention] of Allāh. That is the guidance of Allāh by which He guides whom He wills. And one whom Allāh sends astray - for him there is no guide.

23. Allâh has sent down the Best Statement, a Book (this Qur’ân), its parts resembling each other (in goodness and truth) (and) oft-repeated. The skins of those who fear their Lord shiver from it (when they recite it or hear it). Then their skin and their heart soften to the remembrance of Allâh. That is the guidance of Allâh. He Guides therewith whom He wills; and whomever Allâh sends astray, for him there is no guide.

Allah hath (now) revealed the fairest of statements, a Scripture consistent, (wherein promises of reward are) paired (with threats of punishment), whereat doth creep the flesh of those who fear their Lord, so that their flesh and their hearts soften to Allah's reminder. Such is Allah's guidance, wherewith He guideth whom He will. And him whom Allah sendeth astray, for him there is no guide.