leviticus 6:25 Speak unto Aaron and to his sons, saying, This is the law of the sin offering: In the place where the burnt offering is killed shall the sin offering be killed before the LORD: it is most holy. - Free Bible Online

      25-28. This is the law of the sin offering--It was slain, and the fat and inwards, after being washed and salted, were burnt upon the altar. But the rest of the carcass belonged to the officiating priest. He and his family might feast upon it--only, however, within the precincts of the tabernacle; and none else were allowed to partake of it but the members of a priestly family--and not even they, if under any ceremonial defilement. The flesh on all occasions was boiled or sodden, with the exception of the paschal lamb, which was roasted [Ex 12:8, 9]; and if an earthen vessel had been used, it being porous and likely to imbibe some of the liquid particles, it was to be broken; if a metallic pan had been used it was to be scoured and washed with the greatest care, not because the vessels had been defiled, but the reverse--because the flesh of the sin offering having been boiled in them, those vessels were now too sacred for ordinary use. The design of all these minute ceremonies was to impress the minds, both of priests and people, with a sense of the evil nature of sin and the care they should take to prevent the least taint of its impurities clinging to them.

JFB.