A.T. Robertson Commentary Hebrews 13:11

"For the bodies of those beasts whose blood is brought into the holy place by the high priest [as an offering] for sin, are burned without the camp." — Hebrews 13:11 (ASV)

Of those beasts whose blood (ων ζωων το αιμα τουτων). The antecedent (ζωων) of ων is here incorporated and attracted into the case of the relative, "the blood of which beasts" and then τουτων (genitive demonstrative) is added, "of these." Cf. Leviticus 4:12f.,21; 16:27 for the Old Testament ritual in such cases. This is the only example in the LXX or N.T. where ζωων (animal) is used of a sacrificial victim. See also Ex 29:14; 32:26f. for burning without the camp.