Ecclesiastes 10:11
If the serpent bites before it is charmed, then is there no advantage in the charmer.
Jeremiah 8:17
For, behold, I will send serpents, adders, among you, which will not be charmed, and they shall bite you, says LORD.
Psalm 58:4-5
Their poison is like the poison of a serpent, like the deaf adder that stops her ear,
Psalm 52:2
Thy tongue devises wickedness, like a sharp razor, working deceitfully.
Psalm 64:3
who have whet their tongue like a sword, and have aimed their arrows, even bitter words,
Proverbs 18:21
Death and life are in the power of the tongue, and those who love it shall eat the fruit of it.
James 3:6
And the tongue is a fire, the world of unrighteousness. Thus, the tongue is made to lead among our body-parts, defiling the whole body, and setting the cycle of nature on fire, and being set on fire by hell.