Proverbs 23:16
Yes, my inmost being rejoices when you speak right things.
Proverbs 8:6
Listen for I speak of excellent things. The truth comes from my lips.
Ephesians 4:29
Let no corrupt speech proceed out of your mouth. Speak what is good for understanding as the need may be, that it may give grace (divine favor) to those who hear.
Ephesians 5:4
Nor should there be filthiness, nor foolish talking, or jesting, which are not befitting but rather giving of thanks.
Colossians 4:4
Let me make it known, as I ought to speak.
James 3:2
We all stumble in many things. If any do not stumble in word, he is a perfect man, able to restrain (control) the whole body.