Exodus 14:19-22

14:19 The angel of God, who was going before the camp of Israel, moved and went behind them, and the pillar of cloud moved from before them and stood behind them. 14:20 It came between the Egyptian camp and the Israelite camp; it was a dark cloud and it lit up the night so that one camp did not come near the other the whole night. 14:21 Moses stretched out his hand toward the sea, and the Lord drove the sea apart by a strong east wind all that night, and he made the sea into dry land, and the water was divided. 14:22 So the Israelites went through the middle of the sea on dry ground, the water forming a wall for them on their right and on their left.

Exodus 14:29

14:29 But the Israelites walked on dry ground in the middle of the sea, the water forming a wall for them on their right and on their left.