Both to the genealogy of the priests by the house of their fathers, and the Levites from twenty years old and upward, in their charges by their courses;

and them that were reckoned by genealogy of the priests by their fathers houses, and the Levites from twenty years old and upward, in their offices by their courses;

To the priests by their families, and to the Levites from the twentieth year and upward, by their classes and companies.

both to the priests enregistered according to their fathers' houses, and to the Levites from twenty years old and upward, in their charges, by their divisions;

and them that were reckoned by genealogy of the priests by their fathers' houses, and the Levites from twenty years old and upward, in their charges by their courses;

and the genealogy of the priests by the house of their fathers, and of the Levites, from a son of twenty years and upward, in their charges, in their courses;

And the families of the priests were listed by their fathers' names, but the Levites, of twenty years old and over, were listed in relation to their work in their divisions;

This is the enrollment of the priests by their fathers' houses, and the Levites from twenty years old and upward, in their offices by their divisions;

And so, for the priests, by their families, and for the Levites, from the twentieth year and upward, by their orders and companies,

Both to the genealogy of the priests - Some prefer: "And as for the list of the priests, it was according to the houses of their fathers, and that of the Levites was from twenty years," etc. The writer states the nature of the lists which guided the officers who made the distributions. Three lists are enumerated one of the priests made out according to families; one of the Levites, including all above 20 years of age (see the marginal reference), and made out according to courses; and a third 2-Chronicles 31:18 of the priestly and Levitical families.

From twenty years old - Moses had ordered that the Levites should not begin their labor till they were thirty years of age; but David changed this order, and obliged them to begin at twenty.

Both to the genealogy of the priests by the house of their fathers,.... As to the priests registered according to their families from the age before observed, a portion was given: so to the Levites:
from twenty years old and upward, in their charges, by their courses; for though originally they were not admitted into the tabernacle till twenty five years of age, nor to officiate till thirty, but in David's time they were allowed at twenty years of age and upwards, 1-Chronicles 23:24.

2-Chronicles 31:17 contains a parenthetic remark as to the catalogues. ואת, as nota accus., serves here to emphasize the statement which is added as an elucidation (cf. Ew. 277, d): "But concerning the catalogue of the priests, it was (taken, prepared) according to the fathers'-houses; and the Levites, they were from twenty years old and upwards in their offices in their courses." All the duties were discharged by several courses. On the age fixed on, see 1-Chronicles 23:27.