And Eleazar the son of Aaron the priest shall be chief over the chief of the Levites, and have the oversight of them that keep the charge of the sanctuary.
Chief over the chief of the Levites, х Uwnsiy' (H5387) nªsiy'eey (H5387) ha-Leewiy (H3881), the prince of the princes] - prince or chief of the whole tribe of Levi. Three persons are mentioned as chiefs of those respective divisions: and Eleazar presided over them; whence he is called "the second priest" (2 Kings 25:18); and in case of the high priest's absence from illness or other necessary occasions, he performed the duties. But it appears from the statement made in this verse that the actual high priest was not constituted prince of his tribe, as that would have been the union of a secular dignity with a sacred office (1 Kings 4:4).
Those that encamp ... That being the entrance side, was the post of honour, and consequently reserved to Moses and the priestly family. But the sons of Moses had no station there.