Psalm 19:14
Let the words of my mouth, and the meditation of my heart, be acceptable in thy sight, O LORD, my strength, and my redeemer.
Matthew 12:36-37
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.
Matthew 12:34b
Out of the abundance of the heart the mouth speaketh.
Ephesians 4:29
Let 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.
2 Timothy 2:16
But shun profane and vain babblings: for they will increase unto more ungodliness.
James 1:19b
Let every man be swift to hear, slow to speak, slow to wrath
Proverbs 29:11
A fool uttereth all his mind: but a wise man keepeth it in till afterwards.
Proverbs 16:24
Pleasant words are as an honeycomb, sweet to the soul, and health to the bones.