Acts 7:22-25

And Moses was instructed in all the wisdom of the Egyptians, and he was mighty in his words and deeds. “When he was forty years old, it came into his heart to visit his brothers, the children of Israel. And seeing one of them being wronged, he defended the oppressed man and avenged him by striking down the Egyptian. He supposed that his brothers would understand that God was giving them salvation by his hand, but they did not understand.