Jesus commissions a missionary in Gadara
The man from whom the demons had gone out asked to go with Jesus, but Jesus told him to go home and tell what God had done for him.
Key passages
Mk 5:18–20

And as he was getting into the boat, the man who had been demon-possessed began to implore him that he could go with him. And he did not permit him, but said to him, “Go to your home to your people and tell them all that the Lord has done for you, and that he has had mercy on you.” And he …

Lk 8:38–39

And the man from who the demons had gone out was begging him to stay with him, but he sent him away, saying, “Return to your home and tell all that God has done for you.” And he went away, proclaiming throughout the whole town all that Jesus had done for him.