11 Do not speak evil of one another, brothers. The one who speaks evil of a brother or judges his brother speaks evil of the law and judges the law. But if you judge the law, you are not a doer of the law but a judge of the law.c 12 There is one lawgiver and judge who is able to save and to destroy. But who are you to judge your* neighbor?
The words “of the law” are not in the Greek text, but are an understood repetition from the previous clause
Literally “the”; the Greek article is used here as a possessive pronoun