Malachi 1:7

“Ye offer polluted bread upon mine altar, etc.] Which some understand of the shewbread, mention being afterwards made of a “table”, as Jerom; who observes that it was made of wheat, which the priests themselves sowed, reaped, ground, and baked, and so could take what they would out of it: as for their sowing it, it does not seem likely that they should be employed in such service, whatever may be said for their reaping; since the sheaf of the first fruits was reaped by persons deputed from the sanhedrimf21; though of the reaping of that for the shewbread, I find no mention made; but as for grinding, sifting, kneading, and making it into loaves, and baking it, and taking it out of the oven,…”

“ye offer, &c.--God's answer to their challenge (Mal 1:6), "Wherein have we despised?" polluted bread--namely, blemished sacrifices (Mal 1:8, Mal 1:13-14; Deu 15:21). So "the bread of thy God" is used for "sacrifices to God" (Lev 21:8). polluted thee--that is, offered to thee "polluted bread." table of the Lord--that is, the altar (Eze 41:22) (not the table of showbread). Just as the sacrificial flesh is called "bread." contemptible-- (Mal 1:12-13). Ye sanction the niggardly and blemished offerings of the people on the altar, to gain favor with them. Darius, and probably his successors, had liberally supplied them with victims for sacrifice, yet they presented none but the worst. A cheap…”

“Offering polluted bread upon Mine altar - This, continuing on the words, “despisers of My Name,” , is the answer to their question, “Wherein have we despised Thy Name?” “Bread” might stand, in itself, either for the showbread, or for the מנחה minchāh, meal-offering, which was the necessary accompaniment of sacrifices and sometimes the whole. But here the “polluted bread” cannot be the showbread, since this was not put upon the altar, but upon its own table; and although the altar is, as here, also called “a table” , in regard to the sacrifice hereon consumed, “the table” of the showbread is nowhere called “altar.” The prophet then means by “bread,” either the meal-offering, as representing…”

“Bread - Either the meal - offerings, or rather in a more large sense, all sacrifices and oblations. Ye say - Perhaps in words; at least your deeds speak your thoughts. The table - This comprehends all that was offered to God. Malachi 1:8”

“1:7 defiled the sacrifices?: Ritual uncleanness or contamination disqualified an object or person from being in the ceremonies of worship to the Lord. The defilement in this case resulted from ignoring the laws concerning acceptable animal sacrifices (Lev 22:17-25; Deut 15:21).”

“Ye offer: etc. or, Bring unto my, etc polluted: Lev 2:11, Lev 21:6; Deu 15:21 The table: Mal 1:12; Sa1 2:15-17; Eze 41:22; Co1 10:21, Co1 11:21, Co1 11:22, Co1 11:27-32 Malachi 1:8”