Writing on Islam's claim of Abrahamic ancestry, John explained that the Arabs were called "Saracens" (Greek Σαρακενοί, Sarakenoi) because they were "empty" (κενός, kenos, in Greek) "of Sarah".
Na adresu islamských tvrdení, že islam je pôvodom od Abraháma, Ján vysvetľuje, že Arabi boli nazývaní "Saracéni" (gr. Σαρακενοί, Sarakenoi), pretože boli "prázdni" (grécky κενός, kenos) "Sáry".