Leviticus 6:30
And no sin offering, whereof any of the blood is brought into the tabernacle of the congregation to reconcile withal in the holy place, shall be eaten: it shall be burnt in the fire.
Cross-reference
In Leviticus 4:3-21, sin offerings for priest or congregation have blood brought into the tent, the exact cases where 6:30 forbids eating.
In Leviticus 10:18, Moses notes that because the blood was not brought into the sanctuary, the offering should have been eaten—the inverse of 6:30's rule.
In Leviticus 16:27, Day of Atonement sin offerings are burned outside because their blood was brought into the Holy Place, fulfilling 6:30's requirement.
Leviticus 4:11 describes burning the priest's sin offering outside the camp, following the rule for offerings with blood brought into the tent.
Leviticus 10:16 recounts Moses' anger over a burned sin offering that should have been eaten, directly applying the distinction in Lev 6:30.
Leviticus 16:20 describes atonement for the Holy Place, where blood taken inside requires the sin offering to be burned per Lev 6:30.
Hebrews 9:12 contrasts Christ's own blood entering the holy places once for all, fulfilling and surpassing the OT sin offering rule.
Hebrews 13:11 explicitly cites this practice: sin offerings whose blood is brought into the sanctuary are burned outside the camp.