לֹא־תֹאבֶ֣ה ל֔וֹ וְלֹ֥א תִשְׁמַ֖ע אֵלָ֑יו וְלֹא־תָח֤וֹס עֵֽינְךָ֙ עָלָ֔יו וְלֹֽא־תַחְמֹ֥ל וְלֹֽא־תְכַסֶּ֖ה עָלָֽיו׃
זאָלסטו ניט אײַנװיליקן צו אים, און ניט צוהערן צו אים, און דײַן אױג זאָל אים ניט שױנען, און זאָלסט זיך ניט דערבאַרימען, און אים ניט פֿאַרדעקן.
Makkot
But I'd this logical?! Whether [one holds like] the opinion that it is a mitzvah [for the Goel HaDam to kill the murderer] or whether [one holds like] the opinion that it is permissible, is it permitted [for a son to kill his father]? But Rabba bar Rav Huna said, and so too was taught in a baraisa of the academy of Rebbi Yishmael, For everything a son may not be made into an agent [of the court] against his father to hit him or curse him, except in the case of one who instigates [idolatry] upon which the Torah says (Deuteronomy 13,9) "do not spare him and do not conceal him".