Ἔξοδος 7:17

¹⁷Τάδε λέγει Κύριος, ἐν τούτῳ γνώσῃ ὅτι ἐγὼ Κύριος· ἰδοὺ ἑγὼ τύπτω τῇ ῥάβδῳ τῇ ἐν τῇ χειρί μου ἐπὶ τὸ ὕδωρ τὸ ἐν τῷ ποταμῷ, καὶ μεταβαλεῖ εἰς αἷμα.