Leviticus 4:12
Even the whole bullock shall he carry forth without the camp unto a clean place, where the ashes are poured out, and burn him on the wood with fire: where the ashes are poured out shall he be burnt.
Cross-reference
In Leviticus 4:21, the same disposal procedure is prescribed for the congregation's sin offering — taken outside the camp and burned.
In Leviticus 6:11, the ashes from the burnt offering are also taken outside the camp to a clean place — the same disposal site for sacrificial remains.
In Leviticus 8:17, the sin offering bull for Aaron's consecration is burned outside the camp — identical to the procedure here.
In Leviticus 9:11, Aaron's sin offering for himself is burned outside the camp — following the same rule.
In Leviticus 16:27, the Day of Atonement sin offerings are also taken outside the camp and burned — consistent with the pattern.
Leviticus 13:46 requires the leper to live outside the camp, a parallel place of separation for uncleanness.
In Exodus 29:14, the sin offering bull for priestly consecration is also burned outside the camp — same disposal rule for sin offerings.
Hebrews 13:11 directly references this practice — the bodies of sin offerings whose blood is taken into the sanctuary are burned outside the camp.
Numbers 19:3 describes the red heifer slaughtered outside the camp, a purification ritual similar to the sin offering.
In Ezekiel 43:21, the sin offering for altar purification is also taken outside the sanctuary and burned — echoing the Leviticus procedure.
In Numbers 19:5, the red heifer is also burned outside the camp — a similar disposal location for purification offerings.
Numbers 5:3 commands sending the unclean outside the camp, paralleling the sin offering's disposal location.