Moses then distributed the wagons among the Levites so that the division of the sons of Gershon received two wagons, with the transportation of the heavy portions of the Tabernacle, boards, bars, and similar things, whereas the former, having the lighter portions, had enough with two wagons. The third division of Levites, the sons of Kohath, received no wagons, for they were entrusted with the transportation of the Holy Ark, which might not be lifted upon a wagon, but was to be borne upon their shoulders.
David, who forgot to observe this law and had the Ark lifted upon a wagon, paid heavily for his negligence, for the priests who tried to carry the Ark to the wagon were flung down upon the ground. Ahithophel then called David's attention to the need of following the example of Kohath's sons, who bore the Ark on their shoulders through the desert, and David ordered them to do the same.