Parallel
Exodus 4:23
Swete's Septuagint · Berean Standard Bible
εἶπα δέ σοι Ἐξαπόστειλον τὸν λαόν μου ἵνα μοι λατρεύσῃ· εἰ μὲν οὖν μὴ βούλει ἐξαποστεῖλαι αὐτούς, δρᾶ οὖν, ἐγὼ ἀποκτέννω τὸν υἱόν σου τὸν πρωτότοκον.
and I told you to let My son go so that he may worship Me. But since you have refused to let him go, behold, I will kill your firstborn son!’”