tn The Hebrew text has “this [is that] which [pertains] to the Levites.” “This is what concerns the Levites, meaning, the following rulings are for them.
tc The age of twenty-five indicated in v. 24 should be compared with the age of thirty indicated in Num 4:3, 23, 30. In order to harmonize the numbers given in chapter 4 with the number given in Num 8:24 the LXX (and perhaps its Hebrew Vorlage) has thirty in all of these references. See further G. J. Wenham, Numbers (TOTC 4), 97–98.
tn The infinitive is לִצְבֹא (litsvo’), related to the word for “host, army, company,” and so “to serve as a company.” The meaning is strengthened by the cognate accusative following it.