'Forty Years' in the Bible

For the man was more than forty years old on whom this sign of healing had occurred.

And forty years having been fulfilled, an agent of Lord appeared to him in the wilderness of Mount Sinai in a flame of fire of a bush.

This man brought them forth after performing wonders and signs in the land of Egypt, and in the Red Sea, and in the wilderness forty years.

But God turned, and gave them over to serve the host of heaven, just as it is written in the book of the prophets, Did ye offer to me slain beasts and sacrifices forty years in the wilderness, O house of Israel?

And afterward they asked for a king, and God gave them Saul the son of Kish, a man of the tribe of Benjamin, for forty years.