In addition to other charisms possessed by the godly Euthymius, he also received this one from God—the grace of living with carnivorous and poisonous animals without being harmed by them. This should be doubted by no one initiated into Holy Scripture, who has precise knowledge that when God dwells in a man and rests upon him all beings are subject to him, as they were to Adam before he transgressed God’s commandment. Not only the wild animals but the very elements are subject to such a man: to my statement bear witness those who divided the sea, curbed the Jordan, made the sun stand still, turned fire into dew and performed innumerable other prodigies. According the very God who worked these miracles subjected to the inspired Euthymius also not only the visible but also the spiritual monsters, I mean the spiritual powers of wickedness; for such are the charisms bestowed by God.
From the "Life of St. Euthymius" by St. Cyril of Scythopolis (The Lives of the Monks of Palestine, trans. R.M. Price [Kalamazoo, MI: Cistercian, 1991], pp. 18-9).