For the bodies of those animals, whose blood is brought into the sanctuary by the high priest for sin, are burned outside the camp.
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George Leo Haydock
AD 1849
This is commonly interpreted of the sacrifice of the Eucharist, by which is continued (though in a different manner) Christ's sacrifice on the cross, of which he speaks in the following words, telling them that the bodies of those beasts, with the blood of which the sanctuary was sprinkled on the feast of expiation, (see Leviticus xvi. 29. and xxiii. 27. and Numbers xxix. 8.) were burnt without the camp, not eaten as the other victims. Wherefore Jesus, when he fulfilled this figure, and offered himself on the cross, a sacrifice of expiation for the sins of all mankind, and to obtain for them true sanctification, was pleased to suffer out of the gate of Jerusalem. (Witham)
4. For the bodies of those beasts whose blood is brought into the sanctuary by the High Priest for sin, are burned without the camp. Wherefore Jesus also, that He might sanctify the people with His own blood, suffered (he says) without the gate. Do you see the type shining forth? For sin, he says, and suffered without the gate. Hebrews 13:13 Let us go forth therefore to Him without the camp, bearing His reproach, that is, suffering the same things; having communion with Him in His sufferings. He was crucified without as a condemned person: neither let us then be ashamed to go forth out [of the world].