Exodus 12:12

ועברתי AND I WILL PASS — This is not to be taken literally, but is speaks of God as one speaks of a king who passes from place to place (Mekhilta) but in this case all were punished at a single passage and in one moment. כל בכור בארץ מצרים ALL THE FIRSTBORN IN THE LAND OF EGYPT — also the first-born of other nations who happened then to be in Egypt. And whence may we deduce that the first-born of the Egyptians who happened to be in other countries also died? From what Scripture states: (Psalms 136:10) “To Him that smote the Egyptians in their first-born” (an unqualified statement) (Mekhilta). מאדם עד בהמה FROM MAN TO BEAST — He who first began the wrongdoing, from him began the punishment (Mekhilta). ובכל אלהי מצרים AND AGAINST ALL THE GODS OF EGYPT [WILL I EXECUTE JUDGEMENTS] — An idol of wood rotted, and one of metal melted and was poured out on the ground (cf. Mekhilta)). אעשה שפטים אני ה I WILL EXECUTE JUDGEMENTS, I, THE LORD — I, Myself, and not by means of a messenger (Pesikta Zotarta).

For I will pass through the land of Miżrayim this night, and will smite all the firstborn in the land of Miżrayim, both man and beast: and against all the gods of Miżrayim I will execute judgments: I am the Lord.

וְעָבַרְתִּ֣י בְאֶֽרֶץ־מִצְרַ֘יִם֮ בַּלַּ֣יְלָה הַזֶּה֒ וְהִכֵּיתִ֤י כׇל־בְּכוֹר֙ בְּאֶ֣רֶץ מִצְרַ֔יִם מֵאָדָ֖ם וְעַד־בְּהֵמָ֑ה וּבְכׇל־אֱלֹהֵ֥י מִצְרַ֛יִם אֶֽעֱשֶׂ֥ה שְׁפָטִ֖ים אֲנִ֥י יְהֹוָֽה׃