Verse 17. - These were the sons of Levi. These genealogical notices are inserted here in order to give completeness to the account of the Levites in the day of their dedication.
3:14-39 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.
Gershon, and Kohath, and Merari; these went down with him into Egypt, Genesis 46:11.