Acts 7:23

When he was full forty years old - This was a general tradition among the Jews: "Moses was forty years in Pharaoh's court, forty years in Midian, and forty years he served Israel."

To visit his brethren - Probably on the ground of trying to deliver them from their oppressive bondage. This desire seems to have been early infused into his mind by the Spirit of God; and the effect of this desire to deliver his oppressed countrymen was his refusing to be called the son of Pharaoh's daughter - see Hebrews 11:24, and thus renouncing all right to the Egyptian crown, choosing rather to endure addiction with the people of God than enjoy the pleasures of sin for a season.

Full forty years old - This is not recorded in the Old Testament; but it is a constant tradition of the Jews that Moses was 40 years of age when he undertook to deliver them. Thus, it is said, "Moses lived in the palace of Pharaoh forty years; he was forty years in Midian; and he ministered to Israel forty years" (Kuinoel).

To visit ... - Probably with a view of delivering them from their oppressive bondage. Compare Acts 7:25.

7:23 It came into his heart - Probably by an impulse from God.