Ex 14, 5-18
When Pharaoh king of Egypt was told that the people had fled, he and his officials changed their attitude towards the people. ‘What have we done,’ they said, ‘allowing Israel to leave our service?’ So Pharaoh had his chariot harnessed and set out with his troops, taking six hundred of the best chariots and all the other chariots in Egypt, with officers in each. Yahweh made Pharaoh King of Egypt stubborn, and he gave chase to the Israelites.