en_tn_condensed/psa/036/003.md

The words of his mouth are wickedness and deceit

Here the word "mouth" is a metonym for the writer. The abstract noun "wickedness" can be translated by an adjective. The abstract noun "deceit" can be translated by a verb. Alternate translation: "Everything he says is wicked, and he wants to deceive others" (See: rc://en/ta/man/jit/figs-metonymy and rc://en/ta/man/jit/figs-abstractnouns)

do good

"do things that are good"