Exodus 14:4, 10, 31

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

As Pharaoh drew near, the sons of Israel looked, and behold, the Egyptians were marching after them, and they became very frightened; so the sons of Israel cried out to the LORD.

When Israel saw the great power which the LORD had used against the Egyptians, the people feared the LORD, and they believed in the LORD and in His servant Moses.