Deuteronomy 17:18

καὶ ἔσται ὅταν καθίσῃ ἐπὶ τῆς ἀρχῆς αὐτοῦ καὶ γράψει ἑαυτῷ τὸ δευτερονόμιον τοῦτο εἰς βιβλίον παρὰ τῶν ἱερέων τῶν Λευιτῶν