“And the Lord told Moses, “When you arrive back in Egypt, go to Pharaoh and perform all the miracles I have empowered you to do. But I will harden his heart so he will refuse to let the people go. Then you will tell him, ‘This is what the Lord says: Israel is my firstborn son.”

‭‭Exodus‬ ‭4‬:‭21‬-‭22‬