Proverbs 23:16
yea, my reins shall be very glad, if thy lips speak the thing that is right.
Proverbs 8:6
Give ear, for I will speak of great matters, and open my lips to tell things that be right.
Ephesians 4:29
Let no filthy communication proceed out of your mouths: but that which is good to edify withal, when need is, that it may have favour with the hearers.
Ephesians 5:4
neither filthiness, neither foolish talking, neither jestings, which are not comely: but rather giving of thanks.
Colossians 4:4
that I may utter it, as it becometh me to speak.
James 3:2
For in many things we sin all. If a man sin not in word, the same is a perfect man and able to tame all the body.