Almost immediately after the monastery was completed, a group of the Sinait monks (meaning they originated from the Mount Sinai) settled in the caves in the vicinity. A large number of Sinait monks from the Mount Athos migrated to Serbia in the mid-14th century, fleeing the Ottoman invasion. They all settled in the caves throughout Serbia, due to their hermit lifestyle. Zosimus Sinait, later named The Venerable Zosimus of Tuman, headed the group which settled around the monastery. He was known for the extreme fasting and praying in his poustinia-rocky cave until his death. Zosimus' remains are today the central relic of the monastery. He is also known as Sinait the Miracle Worker and his day is observed on 21 August.