זוהר בראשית — דף רלו ע”ב

Moses grew up in Pharaoh's house, and the Holy One, blessed be He, prepared him there so he would know all the forces of evil. Every prophet was prepared from the womb, and Moses was chosen even before he was born. The secret is that the great ones of Israel are chosen from their mother's womb. Moses emerged from the enemy's house to become the redeemer sent by the Holy One. The hostile environment became the very place of his prophetic formation.