καὶ ἐβάρυνεν Φαραω τὴν καρδίαν αὐτοῦ καὶ ἐπὶ τοῦ καιροῦ τούτου καὶ οὐκ ἠθέλησεν ἐξαποστεῖλαι τὸν λαόν