Numbers 14:33
And your children shall wander in the wilderness forty years, and bear your prostitutions, until your carcasses be wasted in the wilderness.
Torrey's Topical Textbook—AKJV

Joshua 5:6
For the children of Israel walked forty years in the wilderness, till all the people that were men of war, which came out of Egypt, were consumed, because they obeyed not the voice of the LORD: to whom the LORD swore that he would not show them the land, which the LORD swore to their fathers that he would give us, a land that flows with milk and honey.
Torrey's Topical Textbook—AKJV