Exodus 14:4-5

4And 1I will 2harden Pharaoh’s heart, and 3he will chase after them; and I will be honored through Pharaoh and all his army, and 4the Egyptians will know that I am the Lord.” And they did so.

5When the king of Egypt was told that the people had fled, 5Pharaoh and his servants had a change of heart toward the people, and they said, “What is this that we have done, that we have let Israel go from serving us?”