Numbers 2:34

And the children of Israel did according to all that the Lord commanded Moses; so they pitched by their standards, and so they set forward, every one after their families, according to the house of their fathers. To get a complete picture of the encampment of the Israelites, one must imagine a small rectangle representing the Tabernacle. On the right, that is, on the east, of this was the place of Moses, Aaron, and the priests, and beyond them that of the armies under the leadership of Judah; below, on the south, were the 8,000 Kohathites, and beyond them the divisions under the leadership of Reuben; to the left, on the west, were the 7,500 Gershonites, and beyond them the divisions under the leadership of Ephraim; and above, on the north, were the 6,200 Merarites, and beyond them the divisions under the leadership of Dan. As this entire great host moved forward under the guidance of the Angel of the Lord in the cloud, so the army of believers in the New Testament moves forward under the leadership of Christ.