ISB ~ James 4 v11

Do not speak evil:Believers are forbidden to malign each other with either true (detraction) or false information (calumny). This behavior is injurious because it uses words to put others down and lift oneself up. James warns that one who speaks evil vaults himself above the law and therefore into the place of God, who alone is the “lawgiver and judge” of our neighbor (4:12) (CCC 2477).

• This is probably an allusion to the prohibition against slander in Lev 19:16. See note on Jas 2:8.