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

When my heart was embittered
And I was pierced within [as with the fang of an adder],

Thou shalt tread upon the lion and adder: the young lion and the dragon shalt thou trample under feet.

They have sharpened their tongues like a serpent; adders' poison is under their lips. Selah.