New Testament Law

James 4:11-12

James 4:11 Speak not evil one of another, brethren. He that speaketh evil of his brother, and judgeth his brother, speaketh evil of the law, and judgeth the law: but if thou judge the law, thou art not a doer of the law, but a judge. 4:12 There is one lawgiver, who is able to save and to destroy: who art thou that judgest another? [KJV]

Here James warns Christians not to judge your brothers.