וּמְשַׁלְּמֵ֣י רָ֭עָה תַּ֣חַת טוֹבָ֑ה יִ֝שְׂטְנ֗וּנִי תַּ֣חַת רדופי־[רָֽדְפִי־] טֽוֹב׃
They also that repay evil for good are adversaries unto me, because I follow the thing that is good.
Read halakhic rulings (Jewish law) on Psalms 38:21: and classical halakhic sources.