Old Covenant Command
“Thou shalt not bear false witness against thy neighbour.” Exodus 20:16
New Covenant Equivalent
Do not speak evil of your brother :
“Brothers, do not slander one another. Anyone who speaks against his brother or judges him speaks against the law and judges it. When you judge the law, you are not keeping it, but sitting in judgment on it. There is only one Lawgiver and Judge, the one who is able to save and destroy. But you—who are you to judge your neighbor?” (James 4:11-12, NIV).
“…do not steal, do not give false testimony” (Mark 10:19, NIV).
“For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies” (Matthew 15:18, KJV).