Luke 19:22

But he said to him, Out of thy own mouth will I judge thee, thou wicked servant, Thou knewest that I am an austere man, taking up what I laid not down, and reaping what I did not sow;

Matthew 12:37

and by thy words thou shalt be condemned.

Matthew 26:65

Then the high priest rent his clothes, saying, He hath spoken blasphemy, what need have we more of witnesses? now ye have heard his blasphemy, what think ye?

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
and by thy words thou shalt be condemned.
Matthew 26:65
Then the high priest rent his clothes, saying, He hath spoken blasphemy, what need have we more of witnesses? now ye have heard his blasphemy, what think ye?
Luke 19:22
But he said to him, Out of thy own mouth will I judge thee, thou wicked servant, Thou knewest that I am an austere man, taking up what I laid not down, and reaping what I did not sow;