Romans 7:14
We know that the law is spiritual; but I am carnal, sold under sin.
Matthew 12:34-35
Ye brood of vipers, how can ye, being evil, speak good things? For out of the abundance of the heart the mouth speaketh.
Romans 7:12
So that the law is holy, and the commandment holy, and just, and good.
Ephesians 4:29
Let no corrupt discourse proceed out of your mouth, but that which is good, to the use of edifying, that it may minister grace to the hearers.
Colossians 4:6
Let your speech be always with grace, seasoned with salt, that ye may know how ye ought to answer every one.