18 But those things going out from the mouth come forth from the heart; and these pollute the man.
Matthew 15:18 Cross References - Godbey
Matthew 12:34
34 O ye generations of vipers, how are you, being evil, able to speak good things? for out of the abundance of the heart the mouth speaks.
Matthew 15:11
11 That if which cometh into the mouth does not defile the man; but that which cometh out from the mouth, that defiles the man.
Luke 19:22
22 And he says to him, Out of thine own mouth I will judge thee, thou wicked servant. Didst thou know that I am an austere man, taking up what I have not laid down, and reaping what I have not sown?
James 3:6-10
6 The tongue, a fire, the world of iniquity: the tongue sits down in the midst of our members, and corrupting the whole body, and setting on fire the course of nature; and it is set on fire from hell.
7 For every nature both of wild beasts, and of birds, and of creeping things, and of oceanic animals, is subdued, and has been subjugated to human nature:
8 but no one of men is able to tame the tongue; an incorrigible evil, full of deadly poison.
9 With it we bless the Lord, even the Father; and with it we scold the people, who have been made after the image of God:
10 out of the same mouth come forth blessing and scolding. My brethren, these things ought not so to be.