Acts 7:22-25

Moses was educated in all the learning of the Egyptians, and he was a man of power in words and deeds. But when he was approaching the age of forty, it entered his mind to visit his brethren, the sons of Israel. And when he saw one of them being treated unjustly, he defended him and took vengeance for the oppressed by striking down the Egyptian. And he supposed that his brethren understood that God was granting them deliverance through him, but they did not understand.