Numbers 19:7 - Matthew Poole's English Annotations on the Holy Bible

Partly to teach us the imperfection of the Levitical priesthood, in which the priest himself was defiled by some parts of his work, and the absolute necessity of a better and holier priesthood; and partly to show that Christ himself, though he had no sin of his own, yet was reputed by men, and judged by God, as an unclean and sinful person, by reason of our sins which were laid upon him, Isaiah 53:12 2 Corinthians 5:21.