זבחים ח׳:ד׳ - ח׳:ה׳

אברי חטאת – whose flesh/meat is consumed by the Kohanim.

שנתערבו באברי עולה – that is entirely burned up.

יתן למעלן – he should place the limbs of the entire mixture on the wood. And the reason of Rabbi Eliezer is as Scripture states (Leviticus 2:11): “for no leaven or honey may be turned into smoke as a gift to the LORD,” and this is the logical implication of the Biblical verse (ibid.,): “for no leaven or honey may be turned into smoke,” and you should not turn into smoke anything that from which is a fire-offering to God, which is the residue of the sacrifice. “You may bring them to the LORD as an offering of choice products” (Leviticus 2:12), from the leaven and honey to God, the two loaves from the leaven and the honey from the First Fruits from the fruit of the trees which are figs and dates. [And the words], “upon the altar” (ibid.), we expound it, whether it is the leaven or the honey or whether it is the residue, for a pleasing odor [to God] you do not offer them up, but you do offer them up for the sake of wood, and this is what is stated, “and I regard the meat of the sin-offering [which is] on top [of the fires] as if it were wood.”

וחכמים אומרים תעובר צורתן – that is to say, he should leave them until they become disqualified and they would go out to the place of burning [as remnant] like the rest of the consecrated animals that are disqualified, and he doesn’t offer them up on the altar, for he has transgressed because of all that from it were to be burnt-offerings (Leviticus 2:11): “for no heaven or honey may be turned into smoke as a gift to the LORD,” – which he violated not turning it into smoke, but the sin-offering and the portions of the offering placed upon the altar are offered as burnt-offerings, the flesh comes under the ban against not turning it into smoke. And the Halakha is according to the Sages.

אברים באברי בעלי מומים – kosher/fit limbs that were mixed with one limb of a blemished beast, and a Kohen comes and he doesn’t know of their mixture and he offered one of the heads, he should offer all of the heads ab initio, for we assign the prohibited one with that which was offered, but all of these are kosher. And in the Gemara (Tractate Zevakhim 77b) it explains that Rabbi Eliezer did not permit other than to offer them in twos [but not singly], for certainly one from those pairs is permitted and this sacrifice was to be offered because of that one that is permissible. But if it is because that one where there is doubtful prohibition, there would be a doubt with that which was offered first before he changed his mind. But “one by one” lest he didn’t give that sacrifice to be made even according to Rabbi Eliezer, for perhaps this one was forbidden.

חוץ מאחד – except for one pair. And this is explained in the Gemara, that with one pair alone [of heads or legs], Rabbi Eliezer admits that this sacrifice was not given to be offered, as we have stated.