Matthew 15:19

For evil thoughts, murder, extramarital affairs, sexual immorality, stealing, perjury, slander --- [all these] come from a person's heart,

Matthew 26:59

Now the leading priests and the entire Council [called "the Sanhedrin"] looked for false witnesses [to testify] against Jesus, in order to put Him to death.

Acts 6:13

They had arranged for the false witnesses to say, "This man will not stop speaking against the Temple and the law of Moses,

1 Peter 3:16

May your conscience be able to so approve of your conduct that, even if you are ridiculed, those doing it will [eventually] have to be ashamed [of themselves] for criticizing your Christian behavior.

Treasury of Scripture Knowledge

Summary

He that speaketh truth sheweth forth righteousness: but a false witness deceit.

Bible References

But

Matthew 15:19
For evil thoughts, murder, extramarital affairs, sexual immorality, stealing, perjury, slander --- [all these] come from a person's heart,
Matthew 26:59
Now the leading priests and the entire Council [called "the Sanhedrin"] looked for false witnesses [to testify] against Jesus, in order to put Him to death.
Acts 6:13
They had arranged for the false witnesses to say, "This man will not stop speaking against the Temple and the law of Moses,
1 Peter 3:16
May your conscience be able to so approve of your conduct that, even if you are ridiculed, those doing it will [eventually] have to be ashamed [of themselves] for criticizing your Christian behavior.