Proverbs 23:16
Yea, my inmost being shall rejoice, when your lips speak right things.
Proverbs 8:6
Hear; for I will speak of excellent things; and from the opening of my lips shall come right things.
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.
Ephesians 5:4
Neither filthiness, nor foolish talking, nor jesting, which are not fitting: but rather giving of thanks.
Colossians 4:4
That I may make it manifest, as I ought to speak.
James 3:2
For in many things we all offend. If any man offend not in word, the same is a perfect man, and able also to bridle the whole body.