Their poison is like the venom of a serpent;
They are like the deaf horned viper that stops up its 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 sharpen their tongues like a serpent; adders' poison is under their lips. Selah.