Bible verses about the power of words

Death and life are in the power of the tongue: and they that love it shall eat the fruit thereof.

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.

Let your speech be alway with grace, seasoned with salt, that ye may know how ye ought to answer every man.

A soft answer turneth away wrath: but grievous words stir up anger.

Even so the tongue is a little member, and boasteth great things. Behold, how great a matter a little fire kindleth!

Let the words of my mouth, and the meditation of my heart, be acceptable in thy sight, O LORD, my strength, and my redeemer.

Pleasant words are as an honeycomb, sweet to the soul, and health to the bones.

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.

Set a watch, O LORD, before my mouth; keep the door of my lips.

Whoso keepeth his mouth and his tongue keepeth his soul from troubles.

If any man among you seem to be religious, and bridleth not his tongue, but deceiveth his own heart, this man's religion is vain.

A word fitly spoken is like apples of gold in pictures of silver.