Matthew 15:18
But the things which proceed from the mouth come out of the heart; and these defile a man.
Matthew 12:34
How can ye, evil as ye are, speak good things? For out of the abundance of the heart the mouth speaketh.
Matthew 15:11
Not that which goeth into the mouth defileth a man; but that which cometh out of the mouth, this defileth a man.
James 3:6-10
And the tongue is a fire, a world of iniquity! The tongue among our members is that which defileth the whole body, and setteth on fire the wheel of life, and is itself set on fire by hell.
Luke 19:22
He saith to him, Out of thy mouth will I judge thee, wicked servant! thou knewest that I was a harsh man, taking up what I laid not down, and reaping what I did not sow;
Revelation 13:5-6
And there was given to him a mouth speaking great things and blasphemy; and power was given to him to work fortytwo months.