1 Peter 2:22
He never sinned, and no deceitful language was ever heard from His mouth.
James 1:26
If a man thinks that he is scrupulously religious, although he is not curbing his tongue but is deceiving himself, his religious service is worthless.
James 3:2
For we often stumble and fall, all of us. If there is any one who never stumbles in speech, that man has reached maturity of character and is able to curb his whole nature.
1 Peter 2:1
Rid yourselves therefore of all ill-will and all deceitfulness, of insincerity and envy, and of all evil speaking.
Matthew 12:35-37
A good man from his good store produces good things, and a bad man from his bad store produces bad things.
Colossians 3:9
Do not speak falsehoods to one another, for you have stripped off the old self with its doings,
James 1:19
You know this, my dearly-loved brethren. But let every one be quick to hear, slow to speak, and slow to be angry.
James 3:5-10
In the same way the tongue is an insignificant part of the body, but it is immensely boastful. Remember how a mere spark may set a vast forest in flames.
Revelation 14:4-5
These are those who had not defiled themselves with women: they are as pure as virgins. They follow the Lamb wherever He goes. They have been redeemed from among men, as firstfruits to God and to the Lamb.