Holy Rule Of Saint Benedict
How Many Psalms Are to Be Said at the Night Office
During the winter season, having in the first place said the verse:
Deus, in adjutorium meum intende; Domine, ad adjuvandum me festina,
there is next to be said three times, Domine, labia mea aperies, et os
meum annuntiabit laudem tuam (Ps 50:17). To this the third psalm
and the Gloria are to be added. After this the 94th psalm with its
antiphon is to be said or chanted. Hereupon let a hymn follow, and
after that six psalms with antiphons. When these and the verse have
been said, let the Abbot give the blessing. All being seated on the
benches, let three lessons be read alternately by the brethren from the
book on the reading stand, between which let three responsories be
said. Let two of the responsories be said without the Gloria, but after
the third lesson, let him who is chanting say the Gloria. When the
cantor beginneth to sing it, let all rise at once from their seats in
honor and reverence of the Blessed Trinity.
Let the inspired books of both the Old and the New Testaments be read
at the night offices, as also the expositions of them which have been
made by the most eminent orthodox and Catholic Fathers.
After these three lessons with their responsories, let six other psalms
follow, to be sung with Alleluia. After these let the lessons from the
Apostle follow, to be said by heart, then the verse, the invocation of
the litany, that is, Kyrie eleison. And thus let the night office come
to an end.