Isaiah 59:5

“They hatch cockatrice eggs, and weave the spider’s web, &c.] Invent false doctrines according to their own fancies, which may seem fair and plausible, but are poisonous and pernicious; as the “eggs [of the] cockatrice”, which may look like, and may be taken for, the eggs of creatures fit to eat; and spin out of their brains a fine scheme of things, but which are as thin, and as useless, and unprofitable, as “the spider’s web”; and serve only to ensnare and entangle the minds of men, and will not stand before the word of God which sweeps them away at once; particularly of this kind is the doctrine of justification by the works of men, which are like the spider’s web, spun out of its own…”

“cockatrice--probably the basilisk serpent, cerastes. Instead of crushing evil in the egg, they foster it. spider's web--This refers not to the spider's web being made to entrap, but to its thinness, as contrasted with substantial "garments," as Isa 59:6 shows. Their works are vain and transitory (Job 8:14; Pro 11:18). eateth . . . their eggs--he who partakes in their plans, or has anything to do with them, finds them pestiferous. that which is crushed--The egg, when it is broken, breaketh out as a viper; their plans, however specious in their undeveloped form like the egg, when developed, are found pernicious. Though the viper is viviparous (from which "vi-per" is derived), yet during…”

“They hatch cockatrice’ eggs - Margin, ‘Adders’.’ On the meaning of the word rendered here ‘cockatrice,’ see the notes at Isaiah 11:8. Some poisonous serpent is intended, probably the adder, or the serpent known among the Greeks as the basilisk, or cerastes. This figurative expression is designed to show the evil nature and tendency of their works. They were as if they should carefully nourish the eggs of a venomous serpent. Instead of crushing them with the foot and destroying them, they took pains to hatch them, and produce a venomous race of reptiles. Nothing can more forcibly describe the wicked character and plans of sinners than the language used here - plans that are as pernicious,…”

“Cockatrice eggs - One kind put for any venomous creature, a proverbial speech signifying by these eggs mischievous designs, and by hatching them, their putting them in practice. Web - Another proverbial speech whereby is taught, both how by their plots they weave nets, lay snares industriously with great pains and artifice. And also how their designs will come to nothing, as the spider's web is soon swept away. Isaiah 59:6”

“59:5-6 The images of deadly snakes and spiders’ webs represent plans designed to destroy others’ lives and relationships.”

“cockatrice': or, adder's, Isa 14:29; Pro 23:32 \*marg. crushed breaketh out into a viper: or, sprinkled is as if there brake out a viper, Mat 3:7, Mat 12:34 Isaiah 59:6”