Reference to the capture of Caesarea by the Arabs in Theophanes' Chronography:
Τούτῳ τῷ ἔτει ἐπεστράτευσε Μασαλμᾶς τὴν Καισάρειαν Καππαδοκίας καὶ παρέλαβεν αὐτήν.
Theophanes, Chronographia, de Boor, C. (ed.), Theophanis Chronographia (Leipzig 1883), p. 404.13-14.