It was a commonplace idea within the Greco-Roman world that divine beings spoke languages different from human languages, and historians of religion have identified references to esoteric speech in Greco-Roman literature that resemble glossolalia, sometimes explained as angelic or divine language.[citation needed] An example is the account in the Testament of Job, a non-canonical elaboration of the Book of Job, where the daughters of Job are described as being given sashes enabling them to speak and sing in angelic languages.[20]