He was the first Russian prince to forsake the world and enter monastic life, at the Lavra of the Kiev Caves. Though his brothers according to the flesh tried to turn him back from his chosen path, he embraced monastic life zealously, amazing his fellow-monks by his humility and piety. Despite his rank, he insisted upon being treated like the simplest novice, performing the meanest tasks joyfully. In time his abbot allowed him to withdraw from the common life, living entirely in his cell in constant prayer. He reposed in peace in 1143. A few months later his brother Prince Iziaslav was healed of a grave illness when he put on St Nicholas' hair shirt and drank some water from the monastery. The Prince asked to be clothed in the hairshirt on the day of his death.