James 3:5-6
In the same way, the tongue is a small part of the body, but it boasts of great things. Consider how small a spark sets a great forest ablaze. / The tongue also is a fire, a world of wickedness among the parts of the body. It pollutes the whole person, sets the course of his life on fire, and is itself set on fire by hell.

James 3:8-10
but no man can tame the tongue. It is a restless evil, full of deadly poison. / With the tongue we bless our Lord and Father, and with it we curse men, who have been made in God’s likeness. / Out of the same mouth come blessing and cursing. My brothers, this should not be!

Proverbs 6:16-19
There are six things that the LORD hates, seven that are detestable to Him: / haughty eyes, a lying tongue, hands that shed innocent blood, / a heart that devises wicked schemes, feet that run swiftly to evil, ...

Proverbs 11:13
A gossip reveals a secret, but a trustworthy person keeps a confidence.

Proverbs 17:9
Whoever conceals an offense promotes love, but he who brings it up separates friends.

Proverbs 26:20-22
Without wood, a fire goes out; without gossip, a conflict ceases. / Like charcoal for embers and wood for fire, so is a quarrelsome man for kindling strife. / The words of a gossip are like choice morsels that go down into the inmost being.

Romans 16:17-18
Now I urge you, brothers, to watch out for those who create divisions and obstacles that are contrary to the teaching you have learned. Turn away from them. / For such people are not serving our Lord Christ, but their own appetites. By smooth talk and flattery they deceive the hearts of the naive.

1 Corinthians 1:10-11
I appeal to you, brothers, in the name of our Lord Jesus Christ, that all of you agree together, so that there may be no divisions among you and that you may be united in mind and conviction. / My brothers, some from Chloe’s household have informed me that there are quarrels among you.

Galatians 5:19-21
The acts of the flesh are obvious: sexual immorality, impurity, and debauchery; / idolatry and sorcery; hatred, discord, jealousy, and rage; rivalries, divisions, factions, / and envy; drunkenness, orgies, and the like. I warn you, as I did before, that those who practice such things will not inherit the kingdom of God.

Ephesians 4:29-32
Let no unwholesome talk come out of your mouths, but only what is helpful for building up the one in need and bringing grace to those who listen. / And do not grieve the Holy Spirit of God, in whom you were sealed for the day of redemption. / Get rid of all bitterness, rage and anger, outcry and slander, along with every form of malice. ...

Matthew 12:36-37
But I tell you that men will give an account on the day of judgment for every careless word they have spoken. / For by your words you will be acquitted, and by your words you will be condemned.”

Titus 3:10-11
Reject a divisive man after a first and second admonition, / knowing that such a man is corrupt and sinful; he is self-condemned.

1 Peter 3:10
For, “Whoever would love life and see good days must keep his tongue from evil and his lips from deceitful speech.

Psalm 101:5
Whoever slanders his neighbor in secret, I will put to silence; the one with haughty eyes and a proud heart, I will not endure.

Psalm 15:1-3
A Psalm of David. O LORD, who may abide in Your tent? Who may dwell on Your holy mountain? / He who walks with integrity and practices righteousness, who speaks the truth from his heart, / who has no slander on his tongue, who does no harm to his neighbor, who casts no scorn on his friend,