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.

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;

31:1-21 Hezekiah destroys idolatry. - After the passover, the people of Israel applied with vigour to destroy the monuments of idolatry. Public ordinances should stir us up to cleanse our hearts, our houses, and shops, from the filth of sin, and the idolatry of covetousness, and to excite others to do the same. The after-improvement of solemn ordinances, is of the greatest importance to personal, family, and public religion. When they had tasted the sweetness of God's ordinance in the late passover, they were free in maintaining the temple service. Those who enjoy the benefit of a settled ministry, will not grudge the expense of it. In all that Hezekiah attempted in God's service, he was earnest and single in his aim and dependence, and was prospered accordingly. Whether we have few or many talents intrusted to us, may we thus seek to improve them, and encourage others to do the same. What is undertaken with a sincere regard to the glory of God, will succeed to our own honour and comfort at last.