Saint Thaddeus is said to have buried a bottle of the holy anointing oil in Daron under an evergreen tree. Saint Gregory the Illuminator discovered the hidden treasure and mixed it with muron that he had blessed. It is said that "To this day, whenever a new batch of muron is prepared and blessed, a few drops of the old one go into it, so that the Armenian muron always contains a small amount of the original oil blessed by Moses, Jesus Christ, and Gregory the Illuminator." The holy muron is composed of olive oil and forty-eight aromas and flowers. The remaining portion of the previous blessed holy oil is poured into the newly prepared oil during the blessing ceremony and passes the blessing from generation to generation. It is said that this very procedure has been followed for nearly 1700 years. The Catholicos of all Armenians in Etchmiadzin combines a new mixture of holy muron in the cauldron every seven years using a portion of the holy muron from the previous blend. This is distributed to all of the Armenian churches throughout the world. Before Christianity, muron was reserved solely for the enthroning of royalty and for very special events. In later years, it was used with extreme unction and to heal the sick, and to anoint ordained clergy. It is said by the Assyrian Church that the holy anointing oil "was given and handed down to us by our holy fathers Mar Addai and Mar Mari and Mar Tuma." The holy anointing oil of the Assyrian Church is variously referred to as the Oil of the Holy Horn, the Oil of the Qarna, or the Oil of Unction. This holy oil is an apostolic tradition, believed to have originated from the oil consecrated by the apostles themselves, and which by succession has been handed down in the Church to this day. The original oil which the disciples blessed began to run low and more oil was added to it. The Assyrian Church believes that this has continued to this very day with new oil being added as the oil level lowers. This succession of holy oil is believed to be a continuity of the blessings placed upon the oil from the beginning. Both the Oil of Unction and the Holy Leaven are referred to as "leaven" although there is no actual leavening agent, so the nomenclature Holy Leaven seems to be a bit misleading. Yohanan bar Abgareh referred to it in 905 as did Shlemon d-Basra in the 13th century.