'The poison of dragons' and 'the venom of asps,' as in Deuteronomy 32:33, signify the monstrous falsity which springs from the falsified truths of the Word. (Apocalypse Explained 433[30])

In Deuteronomy 32:24, this signifies those falsities which kill and altogether destroy spiritual life. (Apocalypse Explained 556[6])

The venom of serpents signifies cunning and deceit. (Arcana Coelestia 581[2])

(Referências: Apocalypse Explained 433; Deuteronomy 32)