Ephesians 4:29
Let no loose discourse proceed out of your mouth, but whatever is good for useful edification, that it may communicate grace to the hearers.
Matthew 12:35-37
A good man out of the good treasure of his heart bringeth forth good things: and a wicked man out of the evil treasure of his heart bringeth forth evil things.
Colossians 4:6
Let your discourse be always gracious, seasoned with salt, that ye may know how ye ought to reply to every man.
Titus 1:10-11
For there are many disorderly persons vainly talkative, and under a spirit of delusion, especially some of the circumcised;
James 3:6-9
And the tongue is a fire, a world of iniquity: in such manner is the tongue placed among our members, that it defileth all the body, and setteth on fire the circle of nature; and is set on fire of hell.
Romans 10:14-15
How then shall they call upon him in whom they have not believed? and how shall they believe on him of whom they have not heard? but how shall they hear without a preacher?
2 Corinthians 2:16
To the one we are the odour of death unto death, to the other the odour of life unto life: and who is sufficient for these things?
2 Corinthians 11:15
It is no wonder therefore if his ministers also be transformed as ministers of righteousness; whose end will be according to their works.
2 Peter 2:18
Uttering pompous discourses of inanity, ensnaring by the lusts of the flesh, by lascivious impurities, those who had truly escaped from such as live in a course of delusion.