When God commanded Israel to set out from Sinai and continue their march, the Israelites were glad, for during their stay in that place they had throughout eleven days received new laws daily, and they hoped that after having departed from the holy mountain they would receive no further laws. Hence, instead of making a day's march from Sinai, as God had commanded them, they marched incessantly for three days, in order to be as far as possible from the holy spot. They behaved like a boy who runs quickly away after dismissal from school, that his teacher might not call him back. Although this antipathy to His laws vexed God, He did not therefore forsake them, but let the Ark move before them as long as they desired to continue the march. For it was by this token that the Israelites knew that the Shekinah was among them, as God had promised them. As often as they broke camp or pitched camp Moses would say to them: "Do what the Shekinah within the Ark bids you do." But they would not believe Moses that the Shekinah dwelt among them unless he spoke the words: "Rise up, Lord, and let Thine enemies be scattered; and let them that hate Thee flee before Thee," whereupon the Ark would begin to move, and they were convinced of the presence of the Shekinah. The Ark furthermore gave the signal for breaking camp by soaring up high,  and then swiftly moving before the camp at a distance of three days' march, until it found a suitable spot upon which Israel might encamp. 
Hardly had they departed from Sinai when they once more began to lead the wicked course of life that they had for a time abandoned. They began to seek a pretext to renounce God and again to be addicted to idolatry.  They complained about the forced marches which at God's command they had been obliged to make after their departure from Sinai, and in this way showed their ingratitude to God who wanted them as quickly as possible to reach the Holy Land, and for this reason allowed them to cover an eleven days' distance in three days.  Their murmurs and complaints, however, were not silent, but quite loud, for they were anxious that God should hear their wicked words. In punishment for their defamation of the Divine glory, God sent upon them a fire emanating from the very glory. 
Upon twelve occasions did God send a Divine fire upon earth, six times as a token of honor and distinction, but as many times as a punishment. To the first class belong the fire at the consecration of the Tabernacle, at the offering of Gideon as at that of Manoah and of David; at the dedication of Solomon's Temple, and at the offering of Elijah upon Mount Carmel. The six fatal fires are the following: the fire that consumed Nadab and Abihu; that which wrought havoc among the murmuring and complaining multitude; the fire that consumed the company of Korah; the fire that destroyed Job's sheep, and the two fires that burned the first and second troops which Ahaziah sent against Elijah. 
This celestial fire wrought the greatest havoc among the idolatrous tribe of Dan, and among the mixed multitude that had joined the Israelites upon their exodus from Egypt.  The elders of the people turned to Moses, saying: "Rather deliver us as a sheep to the slaughter, but not to a celestial fire that consumes earthly fire."  They should by right have prayed to God themselves, but in this instance they were like the king's son who had kindled his father's anger against him, and who not hastened to his father's friend, begging him to intercede for him. So did Israel say to Moses: "Go thou to God and pray for us." Moses instantly granted their wish, and God without delay heard Moses' prayer and halted the destroying fire.  But God did not simply take the fire away from Israel and put it elsewhere, for it was of such a nature that it would gradually have spread on all sides and finally have destroyed everything. It had in this way caused the destruction in Israel, for, beginning at one end of the camp, it spread so rapidly that one could at not time tell how far it had gone. That the presence of this Divine fire might continue to restrain Israel from sin, God did not allow it to rise back to heaven, but it found its place on the altar of the Tabernacle, where it consumed all the offerings that were brought during Israel's stay in Egypt. This is the same fire that destroyed Aaron's sons as well as Korah's company, and it is the Divine fire that every mortal beholds in the moment of his death. 
On this occasion also it was evident that pious men are greater than the angels, for Moses took bundles of wool and laid them upon the Divine fire, which thereupon went out.  He then said to the people: "If you repent of your sin, then the fire will go out, but otherwise it will burst forth and consume you."