4:4-20 The Kohathites were to carry the holy things of the tabernacle. All the holy things were to be covered; not only for security and respect, but to keep them from being seen. This not only marked the reverence due to holy things, but the mystery of the things signified by those types, and the darkness of the dispensation. But now, through Christ, the case is altered, and we are encouraged to come boldly to the throne of grace.
13. shall take away the ashes from the altar, &c.—The necessity of removing ashes from the altar plainly implies that sacrifices were offered in the wilderness (compare Ex 18:12; 24:4), though that rebellious race seems frequently to have neglected the duty (Am 5:25). No mention is made of the sacred fire; but as, by divine command, it was to be kept constantly burning, it must have been transferred to some pan or brazier under the covering, and borne by the appointed carriers.