4th Century
Portrait of St. Ambrose of Milan

St. Ambrose of Milan

Patristic Period
"

Before it is consecrated, it is bread, but when the words of Christ have been added, it is the body of Christ. Therefore hear him saying: Take and eat ye all of it; for this is my body. And before the words of Christ it is a cup full of wine and water. When the words of Christ have operated, then and there it is made to be the blood of Christ which redeemed the people. "

On the Sacraments View Source