The Rule of St. Benedict - Chapter 12. The Celebration Of The Solemnity Of Lauds

(1) Sunday Lauds begin with Psalm 66, said straight through without a refrain.
(2) Then Psalm 50 follows with an "alleluia refrain.
(3) Lauds continue with Psalms 117 and 62,
(4) the Canticle of the Three Young Men, Psalm 148 through 150, a reading from the Apocalypse recited by heart and followed by a responsory, and Ambrosian hymn, a versicle, the Gospel Canticle, the litany and the conclusion.

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