Charles H. Spurgeon on Psalms 58:4

Adder. Hebrew ntb pethen, the Egyptian cobra (Naja hage), one of the venomous Colubrine Snakes (Colubri). This is one of the so called hooded snakes, with which serpent charmers chiefly deal. The Spectacled Snake proper (Naja tripudians) is a closely related species. The well known Cobra di Capello is another. They are all noted for their deadly bite. The hollow fangs communicate with a poison gland, which being pressed in the act of biting, sends a few drops into the puncture. The venom quickly acts on the whole system, and death soon ensues. John Duns, D.D., in "Biblical Natural Science," 1868.