The Scofield Bible Commentary: 1 Chronicles: 1 Chronicles Chapter 23
The Scofield Bible Commentary, by Cyrus Ingerson Scofield, [1917]
brethren
That is, cousins.
office
That is, their new office, since their former office of bearing the tabernacle was ended.
shewbread
(See Scofield) - (Exo 25:30).