The abstract noun "truth" can be translated using the adjective "true." AT: "Everyone must say only true things to his neighbor" (See: [[rc://en/ta/man/translate/figs-abstractnouns]])
This can be restated to remove the abstract nouns "truth," "justice," and "peace." AT: "When you are making decisions in your gates, judge in a way that is true and just and causes people to live peacefully with each other" (See: [[rc://en/ta/man/translate/figs-abstractnouns]])
The assumed knowledge is that this refers to the places where judgment took place. AT: "in your places of judgment" (See: [[rc://en/ta/man/translate/figs-explicit]])