Acts 7:23

7:23 But when he was about forty years old, it entered his mind to visit his fellow countrymen the Israelites.

Acts 7:30

7:30 “After forty years had passed, an angel appeared to him in the desert of Mount Sinai, in the flame of a burning bush.

Acts 7:36

7:36 This man led them out, performing wonders and miraculous signs in the land of Egypt, at the Red Sea, and in the wilderness for forty years.