Then he caused them to fall by deceit; so when they tasted of the tree, their evil inclinations became manifest to them, and they both began to cover themselves with the leaves of the garden; and their Lord called out to them: Did I not forbid you both from that tree and say to you that the Shaitan is your open enemy?

And do not make your oaths a means of deceit between you, lest a foot should slip after its stability and you should taste evil because you turned away from Allah's way and grievous punishment be your (lot).