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.
Sefer HaMitzvot
That an incited one has been prohibited from loving the inciter and from listening to his words. And that is His, may He be exalted, saying, "Do not esteem him" (Deuteronomy 13:9). And the language of the Sifrei (Sifrei Devarim 89:1) is, "It is implied from its being stated, 'you shall love your neighbor like yourself' (Leviticus 19:18) [that] perhaps you should love this one. [Hence] we learn to say, 'Do not esteem him.'" (See Parashat Re'eh; Mishneh Torah, Foreign Worship and Customs of the Nations 5.)