КОРАН (английский перевод) - 39.23

Allah has sent down the best discourse, a Book, consimilar in its oftrepeated (verses) that the skins of those who fear their Lord tremble; and thereafter their skins and hearts soften to the Remembrance of Allah. Such is the Guidance of Allah, whereby He guides whosoever He will; and whosoever Allah leads astray, he has no guide.