Do not lie to one another, since you laid aside the old self with its evil practices, and have put on the new self who is being renewed to a true knowledge according to the image of the One who created him - a renewal in which there is no distinction between Greek and Jew, circumcised and uncircumcised, barbarian, Scythian, slave and freeman, but Christ is all, and in all. (Colossians 3:9-11 NASB)

But now you also, put them all aside: anger, wrath, malice, slander, and abusive speech from your mouth. (Colossians 3:8 NASB)

​So also the tongue is a small part of the body, and yet it boasts of great things. See how great a forest is set aflame by such a small fire! (James 3:5 NASB)