אַל־תרוב [תָּרִ֣יב] עִם־אָדָ֣ם חִנָּ֑ם אִם־לֹ֖א גְמָלְךָ֣ רָעָֽה׃
Strive not with a man without cause, If he have done thee no harm.
Rashi on Proverbs
if he did you no harm i.e., unless he transgressed a commandment written in the Torah. The Torah states (Lev. 19:18): “And you shall love your fellow as yourself,” but one who is wicked, you may hate.