Surah 81. At-Takwir, Ayah 26

It has been shown that this is no word of a mortal, but that it is full of divine wisdom; that its teaching is not that of a madman, but sane to the core and in accordance with human needs; that it freely and clearly directs you to the right Path and forbids you the Path of evil. Why then hesitate? Accept the divine Grace; repent of your sins; and come to the higher Life.