It is a night to be much observed to Yahweh for bringing them out from the land of Egypt. This is that night of Yahweh, to be much observed of all the children of Israel throughout their generations.

Yahweh went before them by day in a pillar of cloud, to lead them on their way, and by night in a pillar of fire, to give them light, that they might go by day and by night:

It came between the camp of Egypt and the camp of Israel; and there was the cloud and the darkness, yet gave it light by night: and the one didn't come near the other all the night.