The Angel Of God Went Before Them, Exodus 13-14.

Exodus 14:14-16, 19 The Lord will fight for you, and you shall hold your peace.” And the Lord said to Moses, “Why do you cry to Me? Tell the children of Israel to go forward. But lift up your rod, and stretch out your hand over the sea and divide it. And the children of Israel shall go on dry ground through the midst of the sea. And the Angel of God, who went before the camp of Israel, moved and went behind them; and the pillar of cloud went from before them and stood behind them.