Matthew 15:18
But those things which go out from the mouth, come from the heart; and these defile the man.
Matthew 12:34
Generation of vipers, how can you, being evil, speak good things? For out of the abundance of the heart, the mouth speaks.
Matthew 15:11
That which enters the mouth does not defile the man; but that which comes out of the mouth, this defiles the man.
James 3:6-10
And the tongue is a fire, the world of iniquity. So is the tongue placed among our members, defiling the whole body, setting on fire the course of life, and being set on fire by hell.
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.
Revelation 13:5-6
And there was given him a mouth that spoke great things and impious words; and authority was given to him to continue forty-two months.