Of the Canonical System of the Nocturnal Prayers and Psalms.
Girt, therefore, with this twofold girdle of which we have spoken, 672 the soldier of Christ should next learn the system of the canonical prayers and Psalms which was long ago arranged by the holy fathers in the East. Of their character, however, and of the way in which we can pray, as the Apostle directs, “without ceasing,” 673 we shall treat, as the Lord may enable us, in the proper place, when we begin to relate the Conferences of the Elders.
See Book I. c. xi.205:673
1 Thess. v. 17.