Parallel
Exodus 4:23
Westminster Leningrad Codex · Berean Standard Bible
וָאֹמַ֣ר אֵלֶ֗יךָ שַׁלַּ֤ח אֶת־ בְּנִי֙ וְיַֽעַבְדֵ֔נִי וַתְּמָאֵ֖ן לְשַׁלְּח֑וֹ הִנֵּה֙ אָנֹכִ֣י הֹרֵ֔ג אֶת־ בִּנְךָ֖ בְּכֹרֶֽךָ׃
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!’”