Exodus 14:19-20

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.

Exodus 14:24

14:24 In the morning watch the Lord looked down on the Egyptian army through the pillar of fire and cloud, and he threw the Egyptian army into a panic.