Passage cross-references.

These were the sons of Levi after the house of their fathers; even the chief of the fathers, as they were counted by number of names by their polls, that did the work for the service of the house of the LORD, from the age of twenty years and upward.

For by the last words of David the Levites were numbered from twenty years old and above:

Number the children of Levi after the house of their fathers, by their families: every male from a month old and upward shalt thou number them.

And the sons of Merari by their families; Mahli, and Mushi. These are the families of the Levites according to the house of their fathers.

From thirty years old and upward even until fifty years old, all that enter into the host, to do the work in the tabernacle of the congregation.

And those that were numbered of the sons of Gershon, throughout their families, and by the house of their fathers,

And those that were numbered of the families of the sons of Merari, throughout their families, by the house of their fathers,

All those that were numbered of the Levites, whom Moses and Aaron and the chief of Israel numbered, after their families, and after the house of their fathers,

This is it that belongeth unto the Levites: from twenty and five years old and upward they shall go in to wait upon the service of the tabernacle of the congregation:

Speak unto the children of Israel, and take of every one of them a rod according to the house of their fathers, of all their princes according to the house of their fathers twelve rods: write thou every man’s name upon his rod. …

And the rest of the sons of Levi were these: Of the sons of Amram; Shubael: of the sons of Shubael; Jehdeiah. …

And Hezekiah appointed the courses of the priests and the Levites after their courses, every man according to his service, the priests and Levites for burnt offerings and for peace offerings, to minister, and to give thanks, and to praise in the gates of the tents of the LORD.

And these were they which went up from Telmelah, Telharsa, Cherub, Addan, and Immer: but they could not shew their father’s house, and their seed, whether they were of Israel: