Thou shalt not bear false witness against thy neighbor.
That is,
We should fear and love God, and not tell lies about our neighbor, nor betray, slander, or defame him; but excuse him, speak well of him, and look upon all his acts as well-meant.
93. What is "false witness"?
All untruthful speaking about our neighbor, in or out of court.
94. How does one bear false witness in court?
When a witness swears to a lie, and when a judge decides wrong to be right, and right to be wrong.
95. How do we bear false witness out of court?
When we tell lies about our neighbor and slander or defame him in our conversation.
Eph. 4:25. Wherefore, putting away lying, speak every man truth with his neighbor.