Luke 19:22

Then he said to him: Out of your own mouth will I judge you, you wicked servant. You knew that I was a hard man, taking up what I did not lay down, and reaping what I did not sow.

Matthew 12:37

For by your words you shall be justified, and by your words you shall be condemned.

Matthew 26:65

Then the chief priest rent his clothes, and said: He has spoken impiously; what further need have we of witnesses? See now, you have heard his impious words:

Treasury of Scripture Knowledge

Summary

Thine own mouth condemneth thee, and not I: yea, thine own lips testify against thee.

Bible References

Own mouth

Matthew 12:37
For by your words you shall be justified, and by your words you shall be condemned.
Matthew 26:65
Then the chief priest rent his clothes, and said: He has spoken impiously; what further need have we of witnesses? See now, you have heard his impious words:
Luke 19:22
Then he said to him: Out of your own mouth will I judge you, you wicked servant. You knew that I was a hard man, taking up what I did not lay down, and reaping what I did not sow.