Exodus 14:4, 10, 31

Then I will harden Pharaoh’s heart, so that he will pursue them; and I will gain honor over Pharaoh and over all his army, that the Egyptians may know that I am the LORD.” And they did so.

And when Pharaoh drew near, the children of Israel lifted their eyes, and behold, the Egyptians marched after them. So they were very afraid, and the children of Israel cried out to the LORD.

Thus Israel saw the great work which the LORD had done in Egypt; so the people feared the LORD, and believed the LORD and His servant Moses.