Nicene and Post-Nicene Fathers: Series II/Volume XI/John Cassian/The Twelve Books/Book II/Chapter 6

Chapter VI.

Of the Custom of having Twelve Prayers.

the venerable assembly of the Fathers understood that by Divine Providence a general rule had been fixed for the congregations of the brethren through the angel&#8217;s direction, and so decreed that this number should be preserved both in their evening and in their nocturnal services; and when they added to these two lessons, one from the Old and one from the New Testament, they added them simply as extras and of their own appointment, only for those who liked, and who were eager to gain by constant study a mind well stored with Holy Scripture. But on Saturday and Sunday they read them both from the New Testament; viz., one from the Epistles or the Acts of the Apostles, and one from the Gospel. And this also those do whose concern is the reading and the recollection of the Scriptures, from Easter to Whitsuntide.