Deuteronomy 31:2

I am a hundred and twenty years old - The life of Moses, the great prophet of God and lawgiver of the Jews, was exactly the same in length as the time Noah employed in preaching righteousness to the antediluvian world. These one hundred and twenty years were divided into three remarkable periods: forty years he lived in Egypt, in Pharaoh's court, acquiring all the learning and wisdom of the Egyptians; (see Acts 7:20 , Acts 7:23 ;); forty years he sojourned in the land of Midian in a state of preparation for his great and important mission; ( Acts 7:29 , Acts 7:30 ;); and forty years he guided, led, and governed the Israelites under the express direction and authority of God: in all, one hundred and twenty years.