Pharoah’s army came after the Israelites after they left Egypt. God’s people were headed toward the Red Sea. God told them to stand, not fear and He would rescue them as everyone watched.

Exodus 14:

13 But Moses told the people, “Don’t be afraid. Just stand still and watch the Lord rescue you today. The Egyptians you see today will never be seen again. 14 The Lord himself will fight for you. Just stay calm.”

Escape through the Red Sea
15 Then the Lord said to Moses, “Why are you crying out to me? Tell the people to get moving! 16 Pick up your staff and raise your hand over the sea. Divide the water so the Israelites can walk through the middle of the sea on dry ground. 17 And I will harden the hearts of the Egyptians, and they will charge in after the Israelites. My great glory will be displayed through Pharaoh and his troops, his chariots, and his charioteers. 18 When my glory is displayed through them, all Egypt will see my glory and know that I am the Lord!”

19 Then the angel of God, who had been leading the people of Israel, moved to the rear of the camp. The pillar of cloud also moved from the front and stood behind them.