Hebreus 7

Hebreus 7:3

The Jews say that Melchizedek was Shem, Noah's son, and, counting up the total years of his lifetime, they demonstrate that he would have lived up to the time of Isaac; and they say that all the firstborn sons of Noah were priests before Aaron performed the priestly office. Also, by "king of Salem" is meant the king of Jerusalem, which was formerly called Salem. And the blessed apostle writing to the Hebrews makes mention of Melchizedek as "without father or mother" and refers him to Christ and, through Christ, to the church of the Gentiles, for all the glory of the head is assigned to the members.… While he was uncircumcised, he blessed Abraham who had been circumcised; and in Abraham he blessed Levi; and through Levi he blessed Aaron from whom the priesthood afterwards descended. For this reason, he maintains, one should infer that the priesthood of the church, which is uncircumcised, blessed the priesthood of the synagogue, which is circumcised. And as to the Scripture which says, "You are a priest forever after the order of Melchizedek," our mystery is foreshown in the word order; not at all, indeed, in the sacrifice of nonrational victims through Aaron's agency, but when bread and wine, that is, the body and blood of the Lord Jesus, were offered in sacrifice. — HEBREW QUESTIONS ON GENESIS 14.18-19