For the phrases “so that you are justified in your sentence and blameless when you pass judgment,” see Romans 3:4.
Note that this quote in the New Testament is not taken from the Hebrew Bible but from the Greek Septuagint (LXX) which translates into English as “that you may be justified in your words and be victorious when you go to law.” (Translation by NETS — for the Greek version see the title’s tooltip)