This is a night to be observed to the LORD, because he brought them out of the land of Egypt. This is a night of the LORD, to be kept of all the children of Israel and of their generations after them.

And the LORD went before them by day in a pillar of a cloud to lead them the way: and by night in a pillar of fire to give them light: that they might go both by day and night.

and went between the host of the Egyptians and the host of Israel. It was a dark cloud, and gave light by night: so that all the night long the one could not come at the other.