13. How Matins on Ordinary Days Should Be Done
On ordinary days, the celebration of Matins should be done in this way: 2 Psalm 67 is recited without an antiphon, drawn out a little as on Sunday so that all may assemble for Psalm 51, which is recited with an antiphon.
3 After this, two more psalms are recited according to custom, that is: 4 on Monday, Psalms 5 and 36; 5 on Tuesday, Psalms 43 and 57; 6 on Wednesday, Psalms 64 and 65; 7 on Thursday, Psalms 88 and 90; 8 on Fridays, Psalms 76 and 92; 9 on Saturdays, Psalm 143 with the canticle from Deuteronomy divided in two parts, with each followed by the doxology. 10 On the other days, one of the canticles from the prophets is recited as sung by the Roman Church.
11 After these follows the Psalms of Praise, then a reading from the Apostle, recited by heart, a responsory, an Ambrosian hymn, the verse, the Gospel Canticle, the litany, and the conclusion.
12 Morning and evening prayer should absolutely never take place without the superior reciting the Lord’s Prayer at the end for all to hear because of the thorns from conflicts which typically arise. 13 In this way, the community members may cleanse themselves of this kind of fault by the solemn promise made in that prayer when they say:
Forgive us as also we forgive. (Matt 6:12)
14 But at the other offices, let the very last part of that prayer be recited so that all may respond:
But deliver us from evil. (Matt 6:13)