Mark 5:18-20

18 As Jesus was getting into the boat, the demon-delivered man begged to go along,

19 but he wouldn't let him. Jesus said, "Go home to your own people. Tell them your story - what the Master did, how he had mercy on you."

20 The man went back and began to preach in the Ten Towns area about what Jesus had done for him. He was the talk of the town.