תֵּ֭שֵׁב בְּאָחִ֣יךָ תְדַבֵּ֑ר בְּבֶֽן־אִ֝מְּךָ֗ תִּתֶּן־דֹּֽפִי׃
Zasiadasz i przeciw bratu twemu mówisz, na syna matki twojéj rzucasz zakałę.
Rashi on Psalms
your mother’s son with whom you have no [legal] quarrel, since he does not inherit with you.
Rashi on Psalms
slander Heb. דפי, defamation to cast him off, an expression of (Num. 35:20): “he pushes him off (יהדפנו).”