The Holy Rule
How the Night Office Is to Be Said on Sundays
For the night office on Sunday the monks should rise earlier. At this office let the following regulations be observed, namely: after six psalms and the verse have been sung, as we arranged above, and all have been properly seated on the benches in their order, let four lessons with their responsories be read from the book, as we said above. In the fourth responsory only, let the Gloria be said by the chanter, and as soon as he beginneth it let all presently rise with reverence.
After these lessons let six other psalms with antiphons and the verse follow in order as before. After these let there be said three canticles from the Prophets, selected by the Abbot, and chanted with Alleluia. When the verse also hath been said and the Abbot hath given the blessing, let four other lessons from the New Testament be read in the order above mentioned. But after the fourth responsory let the Abbot intone the hymn Te Deum laudamus. When this hath been said, let the Abbot read the lesson from the Gospel, all standing with reverence and awe. When the Gospel hath been read let all answer Amen, and immediately the Abbot will follow up with the hymn Te decet laus, and when he hath given the blessing Lauds will begin.
Let this order of the night office be observed on Sunday the same way in all seasons, in summer as well as in winter, unless perchance (which God forbid) the brethren should rise too late and part of the lessons or the responsories would have to be shortened. Let every precaution be taken that this does not occur. If it should happen, let him through whose neglect it came about make due satisfaction for it to God in the oratory.