Sefer HaMitzvot · Negative Commandments, Chapter 20
1
שהזהיר המוסת שלא ילמד זכות למסית ואפילו יודע לו זכות אין מותר לו להזכירו וללמד. והוא אמרו יתברך לא תחמול ובא הפירוש לא תלמד עליו זכות. (שם, שם):
That He prohibited an incited one from arguing the merit of the inciter. Even if he [knows of] a merit for him, it is not permitted for him to mention it and argue [it]. And that is His, may He be blessed, saying, "nor have compassion on him" (Deuteronomy 13:9). And it appears in the explanation (Sifrei Devarim 89:4), "[It means,] do not argue in his merit." (See Parashat Re'eh; Mishneh Torah, Foreign Worship and Customs of the Nations 5.)
שהזהיר המוסת שלא ילמד זכות למסית ואפילו יודע לו זכות אין מותר לו להזכירו וללמד. והוא אמרו יתברך לא תחמול ובא הפירוש לא תלמד עליו זכות. (שם, שם):
That He prohibited an incited one from arguing the merit of the inciter. Even if he [knows of] a merit for him, it is not permitted for him to mention it and argue [it]. And that is His, may He be blessed, saying, "nor have compassion on him" (Deuteronomy 13:9). And it appears in the explanation (Sifrei Devarim 89:4), "[It means,] do not argue in his merit." (See Parashat Re'eh; Mishneh Torah, Foreign Worship and Customs of the Nations 5.)