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 escape from the wrath that is coming?

Matthew 23:33

You serpents! You brood of vipers! How can you escape a sentence to the pit!

Romans 3:13

Their throats are just like open graves, with their tongues they have spoken treachery; the poison of asps is under their lips.

James 3:8

but the tongue no human being can tame. It is an evil incapable of being quieted, 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 throats are just like open graves, with their tongues they have spoken treachery; the poison of asps is under their lips.
James 3:8
but the tongue no human being can tame. It is an evil incapable of being quieted, full of deadly poison.