The exodus of the Israelites began at Raamses, and although the distance from there to the city of Mizraim, where Moses abode, was a forty days' journey, yet they heard the voice of their leader urging them to leave the land. They covered the distance from Raamses to Succoth, a three days' march, in an instant. In Succoth God enveloped them in seven clouds of glory, four hovering in front, behind, and at the two sides of them, one suspended above them, to keep off rain, hail, and the rays of the sun, and one under them to protect them against thorns and snakes.
The seventh cloud preceded them, and prepared the way for them, exalting the valleys and making low every mountain and hill. Thus they wandered through the wilderness for forty years. In all that time no artificial lighting was needed; a beam from the celestial cloud followed them into the darkest of chambers, and if one of the people had to go outside of the camp, even thither he was accompanied by a fold of the cloud, covering and protecting him.
Only, that a difference might be made between day and night, a pillar of fire took the place of the cloud in the evening. Never for an instant were the people without the one or the other to guide them: the pillar of fire glowed in front of them before the pillar of cloud retired, and in the morning the cloud was there before the fire vanished. The clouds of glory and the pillar of fire were sent for the protection of Israel alone, for none beside, not for the heathen and not for the mixed multitude that went up with them; these had to walk outside of the cloud enclosure.