Event Factoid: The story of Kawad's invasion was related to John of Ephesus years
later when he was a white haired man, living in the monastery at
Beth
Gubrin.
Sources:
E. W Brooks, trans.,Lives of the Eastern Saints III,Patrologia Orientalis 29.2 (1925), https://archive.org/stream/patrologiaorient19pariuoft#page/n163/mode/2up, p: 217.