He was born in Mutalaska, near Caesarea in Cappadocia of pious Christian parents, John and Sophia, during the year 439. His father was a military commander. Traveling to Alexandria on military matters, his wife went with him, but they left their five-year-old son in the care of an uncle. When the boy reached eight years of age, he entered the monastery of St. Flavian located nearby. The gifted child quickly learned to read and became an expert on the Holy Scriptures. In vain did his parents urge St. Sabbas to return to the world and enter into marriage.