Matthew 12:34
You brood of vipers, how can you speak good when you are evil? For the mouth utters what the heart is full of.
Romans 3:13-14
Their throat is an open grave, they are treacherous with their tongues, the venom of an asp lies under their lips.
2 Corinthians 11:3
but I am afraid of your thoughts getting seduced from a single devotion to Christ, just as the serpent beguiled Eve with his cunning.
James 3:6-8
And the tongue is a fire, the tongue proves a very world of mischief among our members, staining the whole of the body and setting fire to the round circle of existence with a flame fed by hell.