Sefer HaChinuch ספר החינוך

The commandment of burning meat of [sacrifices] that has become impure: That we were commanded to burn meat of [sacrifices] that has become impure, as it is stated (Leviticus 7:19), “And meat that touches anything impure shall not be eaten; it shall be burnt with fire.”

What we have written about notar (Sefer HaChinukh 143) is from the roots of the commandment.

From the laws of the commandment is that which they, may their memory be blessed, said (Mishnah Shekalim 8:6) that if it became impure on the interior, we burn it on the interior; if it became impure on the exterior, we burn it on the exterior. And we burn it, whether it became impure from a main category of impurity or its immediate derivative. The owners burn notar of lower level [sacrifices] in their homes. And no bones of [sacrifices] that do not have marrow require burning, except for the bones of the Pesach sacrifice. And this matter strengthens a little our argument that we said about the spoiling of meat. And therefore the bones that do not come to spoiling do not require burning — except for the bones of the Pesach sacrifice: Since they are in the [negative commandment] of “and you shall not break a bone in it” (Exodus 12:46), there is usually a little meat upon them, because of the fear of breaking. And therefore they said in general about all of [their bones] that they require burning. And these are [the items] that are burned: Meat of [sacrifices] that have become impure or notar, or of a sacrifice that has become disqualified; also a meal-offering that has become impure, notar or disqualified; an undetermined guilt-offering about which it has become known (after) [before] its blood was sprinkled that the owner did not sin; a fowl sin-offering that came about a doubt; the hair of a pure nazirite; orlah (fruit of the first three years); and forbidden mixtures of the vineyard (so is it found in most handwritten manuscripts) — behold, these are burnt. And [while we are on this], we will write [the items] that are buried, and these are them: consecrated [animals] that died — whether consecrated for the altar or consecrated for the upkeep of the [Temple]; the fetus of consecrated [animals] that miscarried is to be buried, [and] if it passed a placenta, it is [also] buried; an ox that is stoned; a beheaded calf; the birds of a metsora; the hair of an impure nazirite; a firstborn donkey; meat with milk; and non-sacred animals slaughtered in the [Temple] yard. And the rest of the details of the commandment are elucidated in Pesachim and at the end of Temurah.

And the burning of [sacrifices] that became impure is practiced at the time of the [Temple] by priests and by Israelites. How is this? The burning of [sacrifices] that require burning in the Temple is incumbent upon the priests. And the [Israelite] owners burn those that are burned in the whole city, such as lower order [sacrifices] if they became impure or notar in their homes. And one who transgresses this and did not burn impure meat or notar that is in his hand has violated this positive commandment.