for the showbread: It was the priests' office to place this bread before the Lord; and it was their privilege to feed on the old loaves when they were replaced by the new. 1Ch 9:31-32; Exo 25:30; Lev 24:5-9; 1Ki 7:48; 2Ch 13:11, 2Ch 29:18; Neh 10:33; Mat 12:4; Heb 9:2
the fine flour: 1Ch 9:29-34; Lev 6:20-23
unleavened: Lev 2:4-7, Lev 7:9
pan: or, flat plate
for all manner of measure: The standards of all weights and measures were in the sanctuary; and therefore the Levites had the inspection of weights and measures of every kind, that no fraud might in this way be committed. Honesty is inseparably connected with piety; and hence the Levites, being sufficiently numerous, were employed to superintend the former, as well as the latter. Lev 19:35-36; Num 3:50