Matthew 12:34
Ye brood of vipers, how can ye, being evil, speak good things? For out of the abundance of the heart the mouth speaketh.
Romans 3:13-14
Their throat is an open sepulchre; with their tongues have they used deceit; the poison of asps is under their lips.
2 Corinthians 11:3
But I fear lest as the serpent deceived Eve through his subtilty, so your minds should be corrupted from simplicity toward Christ.
James 3:6-8
And the tongue is a fire, a world of iniquity: it is the tongue among the members which defileth the whole body and setteth on fire the course of nature, and is set on fire of hell.