 (XXV, 5) 

The standardization of what became Byzantine monastic worship began with Saint Sabbas the Sanctified (439–532), who recorded the office as it was practiced at his time in the area around Jerusalem, passing on what had been handed down to him by St. Euthymius the Great (377–473) and St. Theoktistos (c. 467).This area was at the time a major center of both pilgrimage and monasticism, and as a result the daily cycle of services became highly developed.St.