Matthew 15:18

while what comes out of the mouth comes from the heart ??and that is what defiles a man.

Matthew 12:34

You brood of vipers, how can you speak good when you are evil? For the mouth utters what the heart is full of.

Matthew 15:11

it is not what enters a man's mouth that defiles him, what defiles a man is what comes out of his mouth."

James 3:6-10

And the tongue is a fire, the tongue proves a very world of mischief among our members, staining the whole of the body and setting fire to the round circle of existence with a flame fed by hell.

Luke 19:22

He replied, 'You rascal of a servant, I will convict you by what you have said yourself. You knew, did you, that I was a hard man, picking up what I never put down, and reaping what I never sowed!

Revelation 13:5-6

He was allowed to utter loud and blasphemous vaunts, and allowed to exert authority for two and forty months;

Treasury of Scripture Knowledge

Summary

But those things which proceed out of the mouth come forth from the heart; and they defile the man.

Bible References

General references

Matthew 15:11
it is not what enters a man's mouth that defiles him, what defiles a man is what comes out of his mouth."
Matthew 12:34
You brood of vipers, how can you speak good when you are evil? For the mouth utters what the heart is full of.
Luke 19:22
He replied, 'You rascal of a servant, I will convict you by what you have said yourself. You knew, did you, that I was a hard man, picking up what I never put down, and reaping what I never sowed!
James 3:6
And the tongue is a fire, the tongue proves a very world of mischief among our members, staining the whole of the body and setting fire to the round circle of existence with a flame fed by hell.
Revelation 13:5
He was allowed to utter loud and blasphemous vaunts, and allowed to exert authority for two and forty months;