- John of Mar Sabas
Monk at the eremetical abbey (a laura) of Saint Sabas’ near Jerusalem. Martyred with 20 other monks in an Arab anti-Christian raid during which many others were injured but escaped; one of them, named Stephen, wrote a poem in honour of the group known as the Martyrs of Mar Sabas.
- Book of Saints, by the Monks of Ramsgate
- Catholic Online
- Our Sunday Visitor’s Encyclopedia of Saints
- “Saint John Sergius“. CatholicSaints.Info. 20 March 2012. Web. 21 April 2015. <>