According tn tradition, Saint Pachomius the 320m.ch. founded with the help of St. Anthony the first monastery in the Thebaid of Egypt.
He began to look for ways that will help the monks in meditation and prayer in the numbering of the prayers. Thought to make knotted rope and you can use the daily rule of prayer. The devil, however, solve the knots of the rope and defeat in this way the efforts of the monk. Then an angel appeared and taught the monk a special knot consisting of nine crosses symbolizing the nine orders of angels. They knotted them the devil could not solve them so established the prayer, since, as the weapon of prayer.