'Forty Years' in the Bible

For the man was more than forty years of age, upon whom this miracle of healing was performed.

And when forty years were completed, there appeared to him in the desert of mount Sinai the angel of the Lord, in a flame of fire in a bush.

He brought them forth, after performing miracles and signs in the land of Egypt, and in the Red sea, and in the wilderness forty years.

Then God turned, and gave them up to worship the host of heaven; as it is written in the book of the prophets, Have ye offered me slain beasts and sacrifices forty years in the wilderness, O house of Israel?

And about the space of forty years he bore with their behaviour in the wilderness.

And from that time they desired a king: and God gave them Saul the son of Kis, a man of the tribe of Benjamin, during forty years.