James E. Walters (eds.), "Hymn 21 on Nisibis" in last modified May 16, 2018, http://syriaca.org/work/8757 Hymn 21 on Nisibis H. Nis. 21 Madrasha 21 on Nisibis Ephrem — ܐܦܪܝܡ http://syriaca.org/work/8757 Digital Syriac Corpus Hymn 21 on Nisibis part 21