| Gill's Exposition of the Entire Bible And Eleazar the son of Aaron the priest,.... Who was of the first of these families, the Amramites: shall be chief over the chief of the Levites; over the three chiefs of the three houses of the Levites, who were Eliasaph the son of Lael, the chief of the Gershonites; and Elizaphan the son of Uzziel, the chief of the Kohathites; and Zuriel the son of Abihail, the chief of the Merarites: and have the oversight of them that keep the charge of the sanctuary; the Kohathites, who had the care of the things belonging to the holy and most holy places; and these were particularly under the inspection of Eleazar, because they were things the priests had a, special concern in; see Numbers 4:32.
Keil and Delitzsch Biblical Commentary on the Old TestamentAs the priests also formed part of the Kohathites, their chief is mentioned as well, viz., Eleazar the eldest son of Aaron the high priest, who was placed over the chiefs of the three Levitical families, and called פּקדּה, oversight of the keepers of the charge of the sanctuary," i.e., authority, superior, of the servants of the sanctuary.
Geneva Study BibleAnd 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.
Wesley's Notes 3:32 Chief - Next under the high - priest; whence he is called the second priest, 2Kings 25:18, and in case of the high - priest's absence by sickness or other necessary occasions, he was to perform his work, and he had a superiority over all the rest of the priests and Levites. The chief of the Levites - That is, over those three persons, who were each the chief of their several families, Num 3:24,31,34.
Jamieson-Fausset-Brown Bible Commentary32. chief-rather, "chiefs" of the Levites. Three persons are mentioned as chiefs of these respective divisions [Nu 3:24, 30, 35]. And Eleazar presided over them; whence he is called "the second priest" (2Ki 25:18); and in the case of the high priest's absence from illness or other necessary occasions, he performed the duties (1Ki 4:4).
Matthew Henry's Concise Commentary3:14-39 The Levites were in three classes, according to the sons of Levi; Gershon, Kohath, and Merari; and these were subdivided into families. The posterity of Moses were not at all honoured or privileged, but stood upon the level with other Levites; thus it was plain, that Moses did not seek the advancement of his own family, or to secure any honours to it. The tribe of Levi was by much the least of all the tribes. God's chosen are but a little flock in comparison with the world. | 
