Exodus 14:18-22

When I defeat the king, his chariot drivers, and chariots, the Egyptians will know that I am the LORD.” Now the angel of God that usually traveled in front of Israel’s army moved behind them. Also, the pillar of cloud moved from in front of the people and stood behind them. So the cloud came between the Egyptians and the Israelites. This made it dark for the Egyptians but gave light to the Israelites. So the cloud kept the two armies apart all night. Then Moses held his hand over the sea. All that night the LORD drove back the sea with a strong east wind, making the sea become dry ground. The water was split, and the Israelites went through the sea on dry land, with a wall of water on their right and on their left.