Hence learn that the Christian mysteries were before the Jewish. Melchisedech offered bread and wine, being in all things like the Son of God, to Whom it is said, “Thou art a Priest for ever after the order of Melchisedech;” [Ps 110:4] and of Whom it is here said, “Jesus took bread.” [John 12:24]
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Ambr. de Sacr., iv, 3