Matthew 8:30-31 says this, “Now there was a herd of many pigs feeding at a distance from them, and the demons begged Him, saying, ‘If You are going to cast us out, send us into the herd of pigs.'”
A few points about this pigs.
This confirms once more that Jesus and the disciples were not in Jewish territory. Since the Israelites understood pigs to be unclean, they had no reason to keep herds of them. Modern people who read the phrase “a herd of pigs” probably imagine something much smaller than what this scene suggests. Mark’s telling of the story puts the number at about 2,000 pigs (Mark 5:13).
The demons appear to accept their impending fate. Luke tells us that they didn’t want to be sent into the abyss (Luke 8:31), while Mark says they did not want to be sent out of the country (Mark 5:10). The abyss was understood to be a place where demons were kept until the time of God’s judgment (Revelation 9:1–2). Rather than face those options, the demons beg to be sent into the pigs, instead. Scripture does not specify how this would be ultimately any different, given how the animals respond (Matthew 8:32). Still this is their plea.
The demons accept their fate. They know that Jesus has the power and authority to cast them out and they know that that is what is about to happen.
I continue to ponder the fact that every single demon in every story knows and recognizes Jesus, every time. Yet, the disciples back then and us, sometimes daily, don’t recognize Him as the authority in our lives.