Divrey Hayamim Bais 31:17

17 Both to the genealogy of the Kohanim by the Bais Avoteihem, and the Levi’im from twenty years old and upward, in their mishmerot by their machlekot (divisions);

Divrey Hayamim Bais 31:17 Meaning and Commentary

2 Chronicles 31:17

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 ) .

Divrey Hayamim Bais 31:17 In-Context

15 And next to him be’emunah were Eden, and Minyamin, and Yeshua, and Shemayahu, Amaryahu, and Shechanyahu, in the towns of the Kohanim, to give to their achim by machlekot, to the gadol as well as the katan.

16 This was besides those males who were recorded in the genealogical records, from three years old and upward, even unto every one that entereth into the Beis Hashem for its daily duty for their avodas service in their mishmerot (watches, shifts) according to their machlekot,

17 Both to the genealogy of the Kohanim by the Bais Avoteihem, and the Levi’im from twenty years old and upward, in their mishmerot by their machlekot (divisions);

18 And to the genealogy of all their little ones, their nashim, and their banim, and their banot, throughout kol Kahal, for be’emunah (in faithfulness) they set themselves apart as kodesh in kodesh (holiness);

19 Also of the Bnei Aharon the Kohanim, which were in the pasture lands of their towns, in each town, the men that were designated by name to give manot [see 1Chr 31:4] to every zakhar among the Kohanim, and to all that were reckoned by genealogies among the Levi’im.