Exode 7:19-20

19εἶπεν δὲ κύριος πρὸς Μωυσῆν Εἰπὸν Ααρων τῷ ἀδελφῷ σου Λαβὲ τὴν ῥάβδον σου καὶ ἔκτεινον τὴν χεῖρά σου ἐπὶ τὰ ὕδατα Αἰγύπτου καὶ ἐπὶ τοὺς ποταμοὺς αὐτῶν καὶ ἐπὶ τὰς διώρυγας αὐτῶν καὶ ἐπὶ τὰ ἕλη αὐτῶν καὶ ἐπὶ πᾶν συνεστηκὸς ὕδωρ αὐτῶν, καὶ ἔσται αἷμα. καὶ ἐγένετο αἷμα ἐν πάσῃ γῇ Αἰγύπτου ἔν τε τοῖς ξύλοις καὶ ἐν τοῖς λίθοις.

20καὶ ἐποίησαν οὕτως Μωυσῆς καὶ Ααρων, καθάπερ ἐνετείλατο αὐτοῖς κύριος· καὶ ἐπάρας τῇ ῥάβδῳ αὐτοῦ ἐπάταξεν τὸ ὕδωρ τὸ ἐν τῷ ποταμῷ ἐναντίον Φαραω καὶ ἐναντίον τῶν θεραπόντων αὐτοῦ καὶ μετέβαλεν πᾶν τὸ ὕδωρ τὸ ἐν τῷ ποταμῷ εἰς αἷμα.