The g'mara on today's daf presents several laws that are all derived from the command to keep far from a false matter. They include:
A disciple sitting before his master (who is judging a case) who sees that the poor man is right and the wealthy man is wrong must speak up.
A man who has a claim of 100 zuzim against his neighbor may not sue for 200 zuzim with the expectation of being bargained down.
A judge should not hear the words of one litigant before the other arrives.
If two come to court, one dressed in rags and the other in fine garments, they should say to the rich one: either dress like him or dress him like you.