NET
20 So he went away and began to proclaim in the Decapolis what Jesus had done for him, and all were amazed.
Darby
20 And he went away and began to proclaim in the Decapolis how great things Jesus had done for him; and all wondered.
KJV
20 And he departed, and began to publish in Decapolis how great things Jesus had done for him: and all [men] did marvel.