Matthew 15:18

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

Matthew 12:34

"You generation of vipers! How can you speak good, when you are evil? For the mouth speaks what the heart is full of. "When the time of fruit drew near, he sent his slaves to the vine-dressers seized to get his fruit.

Matthew 15:11

"Listen, and pay attention. It is not what goes into a man's mouth that defiles him, but what comes out of it, that defiles the man."

James 3:6-10

And the tongue is a fire; it is a very world of iniquity among our members, defiling the whole body, and setting on fire the wheel of nature, and is itself set on fire by hell.

Luke 19:22

"He said to him, "'By your own words I will Judge you, you wicked slave. You knew, did you, that I was a hard man taking up what I did not lay down, reaping what I did not sow.

Revelation 13:5-6

And he was permitted to utter loud boasts and blasphemies; and there was given to him authority to continue forty-two 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
"Listen, and pay attention. It is not what goes into a man's mouth that defiles him, but what comes out of it, that defiles the man."
Matthew 12:34
"You generation of vipers! How can you speak good, when you are evil? For the mouth speaks what the heart is full of. "When the time of fruit drew near, he sent his slaves to the vine-dressers seized to get his fruit.
Luke 19:22
"He said to him, "'By your own words I will Judge you, you wicked slave. You knew, did you, that I was a hard man taking up what I did not lay down, reaping what I did not sow.
James 3:6
And the tongue is a fire; it is a very world of iniquity among our members, defiling the whole body, and setting on fire the wheel of nature, and is itself set on fire by hell.
Revelation 13:5
And he was permitted to utter loud boasts and blasphemies; and there was given to him authority to continue forty-two months.