Ishoʿdnaḥ's lost ecclesiastical history was written around 850. Elias of Nisibis cites it seventeen times, but for no event earlier than 624 or later than 714. Among the events he is known to have recorded are the death of Shah Khusrau II and the accession of Kavad II (628); ʿUmar's capture of Jerusalem (637); the death of the Emperor Heraclonas and the accession of Constans II (641); Muʿāwiya I's initiation of naval warfare against Byzantium (647); the first Arab civil war (656–661); Constans II's campaign against the Slavs in 660; and Constans II's murder of his brother Theodosius that same year. The Jacobite historians Michael Rabo and Bar Hebraeus cite an otherwise unknown Dnaḥ Ishoʿ the Nestorian for an event of 793, and this may be a garbled reference to Ishoʿdnaḥ.