For the Son of man is Lord even of the sabbath day.
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Rabanus Maurus
AD 856
They pluck the ears of corn when they withdraw men from devotion to the world; they rub them in their hands when they tear away their hearts from the lusts of the flesh; they eat the grain when they transfer such as are amended into the body of the Church.
This they do on the sabbath, that is in the hope of eternal rest, to which they invite others. Also they walk through the corn fields with the Lord, who have delight in meditating on the Scriptures; they are hungry while they desire to find the bread of life, that is the love of God, in them; they pluck the ears of corn and rub them in their hands, while they examine the testimonies to discover what lies hid under the letter, and this on the sabbath, that is, while they are free from disquieting thoughts.