Exodus 20:5

אל קנא A JEALOUS GOD — He is jealous to exact punishment, and does not pass over His rights by pardoning idolatry (Mekhilta). Wherever: the expression קנא occurs it signifies in old French emportement, English zeal, — determining to exact punishment. לשנאי OF THEM THAT HATE ME — This must be explained in the same sense as the Targum takes it: when they retain in their hands (follow the example of) the evil doings of their ancestors (Sanhedrin 27b);

לֹֽא־תִשְׁתַּחֲוֶ֥֣ה לָהֶ֖ם֮ וְלֹ֣א תׇעׇבְדֵ֑ם֒ כִּ֣י אָֽנֹכִ֞י יְהֹוָ֤ה אֱלֹהֶ֙יךָ֙ אֵ֣ל קַנָּ֔א פֹּ֠קֵ֠ד עֲוֺ֨ן אָבֹ֧ת עַל־בָּנִ֛ים עַל־שִׁלֵּשִׁ֥ים וְעַל־רִבֵּעִ֖ים לְשֹׂנְאָֽ֑י׃

thou shalt not bow down to them, nor serve them: for I the Lord thy God am a jealous God, punishing the iniquity of the fathers upon the children unto the third and fourth generation of those that hate me;