Matthew 3:7

But, seeing many of the Pharisees and Sadducees coming to his immersion, he said to them, "Broods of vipers! who warned you to flee from the coming wrath!

Matthew 23:33

Serpents! broods of vipers! How can ye escape the judgment of Hell?

Romans 3:13

their throat is an open sepulchre; with their tongues they used deceit; the poison of asps is under their lips;

James 3:8

but the tongue no man can tame; 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 sepulchre; with their tongues they used deceit; the poison of asps is under their lips;
James 3:8
but the tongue no man can tame; a restless evil, full of deadly poison!