Exodus 29:14

And the flesh of the bullock, and his skin, and his dung, thou shalt burn with fire without the camp; it is a sin offering.

THOU SHALT BURN WITH FIRE WITHOUT THE CAMP; IT IS A SIN-OFFERING. “We do not find any outside sin-offering was one the blood of which was sprinkled within the Sanctuary — upon the veil in front of the Holy of Holies and the golden altar; that kind of a sin-offering was burnt completely outside the camp (Leviticus 6:23). Such a sacrifice, for example, was the sin-offering of the High Priest (ibid., 4:3-12). An outside sin-offering was one the blood of which was sprinkled upon the outer altar that stood in the court of the Tabernacle [or Sanctuary]. Of such a sin-offering only certain fats were burnt on the altar, and the meat eaten by the priests. Since the sin-offering mentioned here was an outside sacrifice, and yet it was to the burnt wholly outside of the camp, it must have been a temporary, special legislation. sin-offering that was to be burnt except this.” Thus is Rashi’s language. It was a temporary, special legislation, according to the words of our Rabbis. The reason for this is, that everything being foreseen by Him, this sin-offering was to effect forgiveness for the making of the golden calf, and it was the sacrifice of the anointed priest; and there [in the Book of Leviticus] He was to command that the blood of the sin-offering [of the High Priest] be brought within [the Tent of Meeting and sprinkled in front of] the veil, [and the sacrifice be burnt outside the camp, Verse 12. Hence He commanded here — in advance — that that sin-offering was to be burnt.]. At present, however, He did not wish to mention that [the blood be brought] within the Tent, for there [in the Book of Leviticus] He says in discernment, [that he sprinkle the blood] in front of the holy veil, and at this point [the Tabernacle] had not yet been sanctified, and the Divine Glory did not yet dwell upon it, that it be called “the holy veil.” Thus the outside sin-offering [mentioned here] was like the inner one [of the anointed priest]. The laying of hands was [also] by Aaron’s sons, [although if it was deemed to be Aaron’s sin-offering the laying of hands should have been done only by Aaron], because He was angry with Aaron to have destroyed him, which means the extermination of his children, therefore they too needed atonement by this sin-offering. The reason for burning [such a sin-offering outside the camp] is the same as the reason for burning the Red Heifer there, and the secret thereof is known from [the text concerning] the goat sent to Azazel.