John Cassian ยท The Institutes of the Coenobia
Book IV
c. xxi.). Among the early monks it was the custom ordinarily to have but one meal a day on the fast days (viz., Wednesday and Friday); this was at the ninth hour; on other days, at the sixth (i.e., midday). Cf. the Conferences XXI. c. xxiii. On festivals (viz., Saturday, Sunday, and holy days), beside the midday meal a supper was allowed as well. And on these days, as we learn from the passage before us, the ordinary grace before and after meat was shortened by the omission of the customary Psalms at other times included in it. On the meals of the monks, cf. S. Jerome's Preface to the Rule of Pachomius and the Rule of S. Benedict, cc. xxxix.-xli., the former of which tells us that, except on Wednesday and Friday, dinner was at midday, and a table was also set for labourers, old men, and children, and (apparently) for all, in the height of summer. For the use of Psalms at grace, see Clement of Alexandria, Poedag. II. iv. 44; Stromateis VII. vii. 49.