3rd Century
St. Cyprian of Carthage
Apostolic & Early Church
St. Cyprian of Carthage (c. 210 – 258), Bishop of Carthage and martyr. Wikipedia
"As the prayer goes forward, we ask and say, Give us this day our daily bread. And this may be understood both spiritually and literally, because either way of understanding it is rich in divine usefulness to our salvation. (…) And therefore we ask that our bread — that is, Christ — may be given to us daily, that we who abide and live in Christ may not depart from His sanctification and body. "
Treatise 4.18
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Why this quote matters
Eucharistic interpretation of the Lord's Prayer petition for daily bread.
Source citation: Treatise 4.18.