הָסֵ֣ר מִ֭מְּךָ עִקְּשׁ֣וּת פֶּ֑ה וּלְז֥וּת שְׂ֝פָתַ֗יִם הַרְחֵ֥ק מִמֶּֽךָּ׃
Put away from thee a froward mouth, And perverse lips put far from thee.
Orchot Chaim L'HaRosh
Never speak evil or slanderously about anyone. Never be contentious or spread lies about other people.