The Lord said to Moses, “When you get back to Egypt, see that you show Pharaoh all the amazing things that I have given you the power to do. But I will make him stubborn so that he will not let the people go.
Pharaoh will not listen to you. Then I will use my power to punish Egypt severely, and I will bring my people, the Israelites, out of Egypt in organized family groups.
The Lord made their enemies stubborn enough to continue fighting against Israel so that he could claim them all for destruction without mercy, as he had commanded Moses.