'Forty Years' in the Bible

And your children shall wander in this wilderness forty years and suffer for your whoredom until your carcasses be wasted in the wilderness,

after the number of the days in which ye searched out the land forty days, and every day a year: so that they shall bear your unrighteousness forty years, and ye shall feel my vengeance.

And the LORD was angry with Israel, and made them wander in the wilderness forty years, until all the generation that had done evil in the sight of the LORD were consumed.