He mentions the war of Heraclius against the Persians (610–28), but not that against the Arabs (beginning 634), so it is likely that he was writing around 630.
Ia menyinggung perang Heraclius melawan Persia (610-28), namun bukan yang melawan orang-orang Arab (mulai 634), sehingga kemungkinan ia menulis sekitar 630.