Whoso wol preye, he moot faste and be clene,
And fatte his soule, and make his body lene.
Whoso will pray, he must fast and be clean,
And fat his soul, and make his body lean.
– Geoffrey Chaucer
The Canterbury Tales, The Summoner’s Tale. The Friar emphasizes the importance of fasting for those who pray. This rather hypocritically comes right after he orders a sizeable meal from the lady of the house.