Parallel
Exodus 9:12
Berean Standard Bible · Westminster Leningrad Codex
But the LORD hardened (note: Or stiffened or strengthened; also in verse 35) Pharaoh’s heart, and he would not listen to them, just as the LORD had said to Moses.
וַיְחַזֵּ֤ק יְהוָה֙ אֶת־ לֵ֣ב פַּרְעֹ֔ה וְלֹ֥א שָׁמַ֖ע אֲלֵהֶ֑ם כַּאֲשֶׁ֛ר דִּבֶּ֥ר יְהוָ֖ה אֶל־ מֹשֶֽׁה׃ס