The angels in heaven learnt what was happening on earth. When they were about to begin their song of praise to God, He silenced them with the words, "My children on earth are singing now," and the celestial hosts had to stop and listen to the song of Israel.[238] Great as the joy of the Hebrews was at their deliverance from the Egyptian bondage, it was exceeded by that of Pharaoh's people at seeing their slaves depart, for with them went the dread of death that had obsessed them. They were like the portly gentleman riding an ass. The rider feels uncomfortable and longs for the moment of alighting, but his longing cannot compare in intensity with that of the ass groaning under the corpulent burden, and when their journey's end is reached, the ass rejoices more than his master. So the Egyptians were happier to be rid of the Hebrews than these were to be free.[239] In general, the Israelites were not in a joyous mood. The strength of men is readily exhausted, mentally and physically, by the strain of a sudden change from slavery to freedom. They did not recover vigor and force until they heard the angel hosts sing songs of praise and joy over the redemption of Israel and the redemption of the Shekinah, for so long as the chosen people is in exile, the Shekinah, who dwells among Israel, is also, as it were, in exile. At the same time, God caused the earth to exhale and send aloft a healing fragrance, which cured them of all their diseases.[240] 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.[241] 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.[242] Only, that a difference might be made between day and night, a pillar of fire took the place of the cloud in the evening.[243] 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.[244] The clouds of glory and the pillar of fire were sent for the protection of Israel alone, for none beside, not for the heathen