Proverbs 23:16
And my thoughts in me will be full of joy when your lips say right things.
Proverbs 8:6
Give ear, for my words are true, and my lips are open to give out what is upright.
Ephesians 4:29
Let no evil talk come out of your mouth, but only what is good for giving necessary teaching, and for grace to those who give ear.
Ephesians 5:4
And let there be no low behaviour, or foolish talk, or words said in sport, which are not right, but in place of them the giving of praise.
Colossians 4:4
So that I may make it clear, as it is right for me to do.
James 3:2
For we all go wrong in a number of things. If a man never makes a slip in his talk, then he is a complete man and able to keep all his body in control.