Matthew 8:30 is the parallel account of the same event — the large herd of pigs feeding on the hillside.

Luke 8:32 is the parallel account of the same event — the large herd of pigs feeding on the hillside.

Leviticus 11:7 declares pigs unclean — explains why demons entering pigs signified impurity.

Isaiah 65:4 links swine flesh with pagan idolatry — adds prophetic condemnation of unclean practices.

Leviticus 11:8 prohibits eating or touching pigs — reinforces the uncleanness of pigs in the cultural context.

Deuteronomy 14:8 reiterates the pig's uncleanness — same law from another book confirming impurity.