Their poison... — Better, they have a venom like, &c. The term for serpent is the generic nâchash.
The most forcible images of determined wickedness, and of the destruction it entails, now follow. The first is supplied by the serpent, the more suggestive from the accumulated evil qualities of which that animal has from the first been considered the type. Here the figure is heightened, since the animal is supposed to have been first tamed, but suddenly darts forth its fangs, and shows itself not only untamed, but untameable.
Adder. — Heb., pethen, translated asp in Deuteronomy 32:33; Job 20:14; Isaiah 11:8 (and here by the LXX.) In the Bible Educator iv. 103, the pethen is identified with the Egyptian cobra, the species upon which the serpent charmers practise their peculiar science.
Deaf. — So Jeremiah 8:17 refers to various kinds of serpents that “will not be charmed.” Here, however, it would seem as if the poet were thinking of some individual of a species, generally tractable, that obstinately resists the spells and incantations of the charmer.
The image of the deaf adder was a favourite with Shakespeare, who, no doubt, derived it from this psalm.
“Pleasure and revenge
Have ears more deaf than adders to the voice
Of any true decision.”
Troilus and Cressida, iii. 2.
(Comp. 2 Hen. VI., iii. 2.)