Aḥmad ibn Yaḥyá al-Balādhurī, The Origins of the Islamic State… (1916)
“ These men made terms with Khâlid, stipulating that they pay 100,000 dirhams per year, others say 80,000 per year, that they act as spies for the Moslems against the Persians, and that Khalid would not destroy any of their churches or citadels. It was reported by abu-Mikhnaf , on the authority of abu-l-Muthannah-l-Walîd ibn-al-Ḳaṭâmi, who is the same as ash-Sharḳi ibn-al-Ḳaṭâmi-l-Kalbi, that ʿAbd-al-Masiḥ, who was an aged man, appeared before Khâlid who asked him, "Where dost thou come from, old man?" ”
