The demons from the man begged Jesus Christ to be sent to the pigs. When the pigs fell off the cliff and died, where did the demons or evil spirits go? And they besought him that he would not command them to go out into the deep (Luke 8:31 KJV)
NKJV - 31 And they begged Him that He would not command them to go out into the abyss.
For follow-up discussion and general commentary on the topic. Comments are sorted chronologically.