Mark 5:20

And he went away, and began to proclaim in Decapolis what Jesus did to him: and all were wondering.

Matthew 4:25

And many crowds followed him from Galilee, and Decapolis, and Jerusalem, and Judea, and beyond Jordan.

Mark 7:31

And again, having gone out from the bounds of Tyre and Sidon, he came to the sea of Galilee, in the midst of the bounds of Decapolis.

Treasury of Scripture Knowledge

Summary

And he departed, and began to publish in Decapolis how great things Jesus had done for him: and all men did marvel.

Bible References

Decapolis

Mark 7:31
And again, having gone out from the bounds of Tyre and Sidon, he came to the sea of Galilee, in the midst of the bounds of Decapolis.
Matthew 4:25
And many crowds followed him from Galilee, and Decapolis, and Jerusalem, and Judea, and beyond Jordan.