Matthew 3:7

But when he saw many of the Pharisees and Sadducees coming for baptism, he said to them, "You brood of vipers! Who warned you to flee from the wrath to come?

Matthew 23:33

You serpents! You brood of vipers, how are you to escape being sentenced to hell?

Romans 3:13

"Their throat is an open grave; they use their tongues to practice deceit." "The poison of asps is under their lips."

James 3:8

But no man can tame the tongue. It is a restless evil, full of deadly poison.

Treasury of Scripture Knowledge

Summary

Their poison is like the poison of a serpent: they are like the deaf adder that stoppeth her ear;

Bible References

Poison

Romans 3:13
"Their throat is an open grave; they use their tongues to practice deceit." "The poison of asps is under their lips."
James 3:8
But no man can tame the tongue. It is a restless evil, full of deadly poison.