περὶ ταῦτα οὕτω σφι νενομοθέτηται → it has been so ordained by law
confirm: P. βεβαιοῦν, P. and V. ἐμπεδοῦν (Plato, also Ar.).
bear witness to: P. and V. μαρτυρεῖν (acc.).
