King James Version (KJV)
Who smote the firstborn of Egypt, both of man and beast.
Modern English
He it was who struck down the firstborn of Egypt, both of man and of beast;
Hebrew
שֶׁ֭הִכָּה בְּכוֹרֵ֣י מִצְרָ֑יִם מֵאָדָ֥ם עַד בְּהֵמָֽה׃
shehikah bkvorey miṣrayim meʾadam ʿad bhemah