Dear Friends,
I have to share that last night I received my 300-knot prayer rope from the same site that Diak called our attention to above.
It is quite long with a divider every one hundred knots.
The Byzantine Psalter is divided into twenty sections called "Kathismata" or "Kathisma" in the singular.
Each "Kathisma" is further subdivided into three sections, each ending with the long doxology.
St Basil prescribed the saying of 300 Jesus Prayers for each of the twenty sections (100 for each subsection or "stasis").
Thus, to use the 300-knot prayer rope and go around it once is to say the equivalent of a Kathisma of the Byzantine Psalter by means of the Jesus Prayer.
And to say the 300-knot prayer rope twenty times is to say the entire Psalter in Jesus Prayers.
As a substitute for the Office, one would say the 300-knot prayer rope three times in Jesus Prayers and once to the Mother of God: Most Holy Sovereign Mother of God, save me a sinner!.
This rule is said once for Vespers, Compline, the Hours and the Midnight office (also for preparation for Holy Communion).
But it is said twice for Matins.
Just thought you might like to know
Alex