In Isaiah 14:22, this signifies all truths (or falsities) from firsts to lasts. (Apocalypse Explained 724[34])

'Swine,' as in Matthew 7:6, signify the filthy loves that are in the hells of adulterers. They also signify people who only love worldly riches, and not spiritual riches, which are the knowledges of good and truth derived from the Word. To eat the flesh of 'swine,' as in Isaiah 65:4, signifies appropriate infernal evils.

(References: Apocalypse Explained 1014; Apocalypse Revealed 727)