Not changing his place, for he was the omnipresent God, Exodus 14:15; but his operation, from leading the Israelites forward in their way, to the protecting of them from their pursuers.
Related Commentaries of Exodus 14:19
Exodus 14:19
19 And the angel of God, which went before the camp of Israel, removed and went behind them; and the pillar of the cloud went from before their face, and stood behind them: