Verses 1–4
NUMBERS=CHAPTER FOUR
Verses 1-4:
Chapter three outlines the general service for each of the three Levitical families. Chapter four gives specific details of this service.
Thirty years was the age at which the Levites became liable for the service of the Tabernacle. This age was soon lowered to twenty-five, see Nu 8:24. Scripture offers no explanation for his. During the reign of David, he lowered the age still further to twenty, 1Ch 23:27.
This text is likely the basis for the Jews’ custom that thirty years was the age at which a man attained to full maturity. It was at this age that Jesus began His personal ministry, Lu 3:23.
"Into the host" does not refer to military service, but to the service of the Lord.
"To do the work," literally, "to war the warfare."
The "most holy things" refer to the articles of furniture in the Tabernacle itself: the Ark of the Covenant, the golden incense altar, the table of shewbread, and the gold lampstand. These were to be the responsibility of the Kohathites.