It was a cloud and darkness to the Egyptians, to whom it brought their former horrible darkness to mind, and did both exceedingly affright them, and altogether hinder them from motion or action, as that also did for three days. But it gave light by night to the Israelites, as the opposition showeth.
Related Commentaries of Exodus 14:20
Exodus 14:20
20 And it came between the camp of the Egyptians and the camp of Israel; and it was a cloud and darkness to them, but it gave light by night to these: so that the one came not near the other all the night.