Exode 12:12-13

12καὶ διελεύσομαι ἐν γῇ Αἰγύπτῳ ἐν τῇ νυκτὶ ταύτῃ καὶ πατάξω πᾶν πρωτότοκον ἐν γῇ Αἰγύπτῳ ἀπὸ ἀνθρώπου ἕως κτήνους καὶ ἐν πᾶσι τοῖς θεοῖς τῶν Αἰγυπτίων ποιήσω τὴν ἐκδίκησιν· ἐγὼ κύριος.

13καὶ ἔσται τὸ αἷμα ὑμῖν ἐν σημείῳ ἐπὶ τῶν οἰκιῶν, ἐν αἷς ὑμεῖς ἐστε ἐκεῖ, καὶ ὄψομαι τὸ αἷμα καὶ σκεπάσω ὑμᾶς, καὶ οὐκ ἔσται ἐν ὑμῖν πληγὴ τοῦ ἐκτριβῆναι, ὅταν παίω ἐν γῇ Αἰγύπτῳ.