'Forty Years' in the Bible

For the children of Israel walked forty years in the wilderness, till all the people of men of war that came out of Egypt were consumed, which hearkened not unto the voice of God; so that the LORD sware, that he would not show them the land which the LORD sware unto their fathers, that he would give us even a land that floweth with milk and honey.

Forty years old was I when Moses the servant of the LORD sent me from Kadesh Barnea to spy out the land. And I brought them word again even as I thought in mine heart.