Exodus 14:6

4I will harden Pharaoh’s heart, and he will follow after them; and I will get honor over Pharaoh, and over all his armies; and the Egyptians shall know that I am the LORD.” They did so.

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

6He prepared his chariot, and took his army with him;

7and he took six hundred chosen chariots, and all the chariots of Egypt, with captains over all of them.

8The LORD hardened the heart of Pharaoh king of Egypt, and he pursued the children of Israel; for the children of Israel went out with a high hand.