Blue Letter Bible

1Ch 23:24 — 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.

Phrase from KJV (Help)		Correlating Verses

the sons of Levi	Num 10:17,21
after the house	Num 1:4; Num 2:32; Num 3:15,20; Num 4:34-49
by their polls	Num 1:2,18,22; Num 3:47
from the age	At first David appointed the Levites to serve from thirty years old and upwards; but considering, probably, that the temple which was about to be built, with its courts, chambers, etc., would require a more numerous ministry, he fixed this period, by this subsequent regulation, at twenty years and upwards. In the time of Moses, the age was from thirty years to fifty: here this latter period is not mentioned, probably because the service was not so laborious now; for the ark being fixed, they had no longer any burdens to carry; and therefore even an old man might continue to serve. See the Note on Num 8:24.
twenty	1Ch 23:3,27; Num 1:3; Num 4:3; Num 8:24; Ezr 3:8