On the feasts of the saints and on all solemn festivals let the night office be performed as we said it should be done on Sunday; except that the psalms, the antiphons, and the lessons proper for that day be said; but let the number above mentioned be maintained.
Chap. 14
All scripture is given by inspiration of God and is profitable for doctrine, reproof, correction, and instruction in righteousness (2 Timothy 3:16).