Ephesians 4:29 KJV
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.
Our goal should be to speak life into those around us. Speaking positive things that will edify.
Proverbs 18:21 KJV
Death and life are in the power of the tongue: and they that love it shall eat the fruit thereof.