Ephesians 4:29Let no corrupt communication proceed out of your mouth, but that which is good to the use of edifying, that it may minister grace unto the hearers.
Matthew 12:35-37A good man out of the good treasure of the heart bringeth forth good things: and an evil man out of the evil treasure bringeth forth evil things. But I say unto you, That every idle word that men shall speak, they shall give account thereof in the day of judgment. For by thy words thou shalt be justified, and by thy words thou shalt be condemned.
Colossians 4:6Let your speech be alway with grace, seasoned with salt, that ye may know how ye ought to answer every man.
Proverbs 10:19-21In the multitude of words there wanteth not sin: but he that refraineth his lips is wise. The tongue of the just is as choice silver: the heart of the wicked is little worth. The lips of the righteous feed many: but fools die for want of wisdom.
Proverbs 10:31The mouth of the just bringeth forth wisdom: but the froward tongue shall be cut out.
Proverbs 11:30The fruit of the righteous is a tree of life; and he that winneth souls is wise.
Proverbs 12:13The wicked is snared by the transgression of his lips: but the just shall come out of trouble.
Proverbs 13:2-3A man shall eat good by the fruit of his mouth: but the soul of the transgressors shall eat violence. He that keepeth his mouth keepeth his life: but he that openeth wide his lips shall have destruction.
Proverbs 18:4-7The words of a man's mouth are as deep waters, and the wellspring of wisdom as a flowing brook. It is not good to accept the person of the wicked, to overthrow the righteous in judgment. A fool's lips enter into contention, and his mouth calleth for strokes. A fool's mouth is his destruction, and his lips are the snare of his soul.
Ecclesiastes 10:12-14The words of a wise man's mouth are gracious; but the lips of a fool will swallow up himself. The beginning of the words of his mouth is foolishness: and the end of his talk is mischievous madness. A fool also is full of words: a man cannot tell what shall be; and what shall be after him, who can tell him?
Titus 1:10-11For there are many unruly and vain talkers and deceivers, specially they of the circumcision: Whose mouths must be stopped, who subvert whole houses, teaching things which they ought not, for filthy lucre's sake.
James 3:6-9And the tongue is a fire, a world of iniquity: so is the tongue among our members, that it defileth the whole body, and setteth on fire the course of nature; and it is set on fire of hell. For every kind of beasts, and of birds, and of serpents, and of things in the sea, is tamed, and hath been tamed of mankind: But the tongue can no man tame; it is an unruly evil, full of deadly poison. Therewith bless we God, even the Father; and therewith curse we men, which are made after the similitude of God.
Isaiah 57:19I create the fruit of the lips; Peace, peace to him that is far off, and to him that is near, saith the LORD; and I will heal him.
Romans 10:14-15How then shall they call on him in whom they have not believed? and how shall they believe in him of whom they have not heard? and how shall they hear without a preacher? And how shall they preach, except they be sent? as it is written, How beautiful are the feet of them that preach the gospel of peace, and bring glad tidings of good things!
2 Corinthians 2:16To the one we are the savour of death unto death; and to the other the savour of life unto life. And who is sufficient for these things?
2 Corinthians 11:15Therefore it is no great thing if his ministers also be transformed as the ministers of righteousness; whose end shall be according to their works.
2 Peter 2:18For when they speak great swelling words of vanity, they allure through the lusts of the flesh, through much wantonness, those that were clean escaped from them who live in error.