World Wide Study Bible
a Bible passage
20And he went away and began to proclaim in the Decapolis how much Jesus had done for him; and everyone was amazed.
20. And he departed, and began to publish—not only among his friends, to whom Jesus immediately sent him, but
in Decapolis—so called, as being a region of ten cities. (See on Mt 4:25).
how great things Jesus had done for him: and all men did marvel—Throughout that considerable region did this monument of mercy proclaim his new-found Lord; and some, it is to be hoped, did more than "marvel."