'Forty' in the Bible

About forty thousand prepared for war passed over before the LORD unto battle, to the plains of Jericho.

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: unto whom the LORD sware that he would not shew them the land, which the LORD sware unto their fathers that he would give us, a land that floweth with milk and honey.

Forty years old was I when Moses the servant of the LORD sent me from Kadeshbarnea to espy out the land; and I brought him word again as it was in mine heart.

And now, behold, the LORD hath kept me alive, as he said, these forty and five years, even since the LORD spake this word unto Moses, while the children of Israel wandered in the wilderness: and now, lo, I am this day fourscore and five years old.

All the cities of the Levites within the possession of the children of Israel were forty and eight cities with their suburbs.

When they cried out to the Lord [for help], He put darkness between you and the Egyptians, and brought the sea upon them and covered them; and your own eyes saw what I did in Egypt. And you lived in the wilderness a long time (forty years).