Matthew 12:34
O race of vipers, how can ye speak good things, who are yourselves so wicked? for out of the abundance of the heart the mouth speaketh.
Romans 3:13-14
Their throat is an open sepulchre: with their tongues they have used deceit; the poison of asps is under their lips:
2 Corinthians 11:3
But I fear least as the serpent seduced Eve by his subtilty, so your minds should be corrupted from the purity that is in Christ.
James 3:6-8
And the tongue is a fire, a world of iniquity: so is the tongue among our several parts, defiling the whole body, inflaming the course of nature, and is set on fire by hell.