From a
Collection of Letters published in 1660 by Sir Tobie Matthew and discovered by London Vegetarian Society member Bertram G. Theobald.
Mr. Theobald further researched the reference to 'Prudentius' and concluded that the line refers to a passage by Aurelius Prudentius Clemens from A.D. 405 which prayed:
"Grant to thy servant, bounteous God, this boon in answer to their prayers, that by a light repast refreshed, their limbs may strong and active be, nor ever feel the weight imposed by loaded stomach gorged with meat."
Above reproductions taken from
The Vegetarian News (March 1934)