Answer:
Saint Thomas Aquinas taught that the most obvious Old Testament prefiguring of the sign aspect of the Eucharist was the action of Melchizedek in Genesis 14:18, that all the Old Testament sacrifices, especially that of the Day of Atonement, prefigured the content of the sacrament, namely Christ himself sacrificed for us, and that the manna was a special prefiguration of the effect of the sacrament as grace; but he said that the paschal lamb was the outstanding type or figure of the Eucharist...
Step-by-step explanation:
have a nice day.