From thirty years old and upward, until fifty years old,
shalt thou number them,.... Take an account how many there are of that age, and so fit for service a; Numbers 4:3;
to do the work in the tabernacle of the congregation; as the rest of the Levites; see Numbers 4:3;
a לצבא צבא "ad militandum militiam", Montanus, Drusius.