Hebreus 7
Bede
Hebreus 7:1
Just as our Redeemer, when he appeared in the flesh, deigned to become like a king to us by bestowing a heavenly kingdom, so too did he become a high priest by offering himself for us as a sacrifice to God with an odor of sweetness. Hence it is written, "The Lord has sworn and will not change his mind, 'You are a priest forever according to the order of Melchizedek.' " Melchizedek, as we read, was a priest of the Most High God long before the time of the priesthood of the law, and he offered bread and wine to the Lord. Our Redeemer is said to be a priest "after the order of Melchizedek" because he put aside the sacrificial victims stipulated by the law and instituted the same type of sacrifice to be offered in the new covenant in the mystery of his own body and blood. — Homilies on the Gospels 2.19
Hebreus 7:17
And in the Apocalypse, John the apostle … says, "Who loved us and washed from us our sins in his blood." Not only did he wash away our sins in his blood when he gave his blood for us on the cross, or when each of us was cleansed in his baptism by the mystery of his most sacred passion. But he also takes away every day the sins of the world and washes us of our daily sins in his blood, when the memory of his blessed passion is reenacted on the altar, when a created thing, bread and wine, is transformed by the ineffable sanctification of the Spirit into the sacrament of his flesh and blood. Thus his body and blood is not poured forth and slain by the hands of the unfaithful to their own ruin, but he is taken by the mouth of the faithful to their salvation.The lamb in the law of Passover rightly shows us a type of him, since, having once liberated the people from their Egyptian servitude, it sanctified the people every year by being immolated in memory of their liberation, until he came, to whom such a sacrificial offering gave testimony. When he was offered to the Father for us as a sacrificial offering and for a sweet savor, he transformed, by the lamb that was offered, the mystery of his passion into a created thing, bread and wine, having been made "a priest forever after the order of Melchizedek." — Homilies on the Gospels 1.15