In Leviticus 11:7 and Matthew 7:6, this signifies filthy loves of those in the hells of adulterers. (Apocalypse Explained 1044[4]) Swine signify people who love only worldly riches. (Apocalypse Revealed 727)

In Isaiah 65:4, this signifies appropriation of infernal evils. (Apocalypse Explained 659[2]) 'Swine' or 'hogs' correspond to the life of greed and its delight.

(References: Arcana Coelestia 1742)

8609. 'And they took a stone' means the lowest level of God's truth. This is clear from the meaning of 'a stone' as truth, 643, 1298, 3720, 3769, 3771, 3789, 3798, 6426, in this instance the lowest level of truth since it was put underneath him and he sat on it. An ordinary stone furthermore means a lower level of truth, while a precious stone means a higher or more internal level of truth. What the lowest level of truth is becomes clear from what has been stated above in 8603 about the levels of truth that follow one another in order; that is to say, there are interior truths and exterior truths, the lowest of which are meant by the lowest level of truth.