The children of Israel went out. — Rather, were going out.
With an high hand — i.e., confidently, boldly, perhaps somewhat proudly, as having brought the Egyptians to entreat them to take their departure (Exodus 12:33).
Related Commentaries of Exodus 14:8
Exodus 14:8
8 And the LORD hardened the heart of Pharaoh king of Egypt, and he pursued after the children of Israel: and the children of Israel went out with an high hand.