Mark 5:20

and he departed, and published in Decapolis, what Jesus had done for him: and all were filled with admiration.

Matthew 4:25

and a great multitude of people followed him from Galilee, from Decapolis, from Jerusalem, from Judea, and from about Jordan.

Mark 7:31

Jesus then quitting the confines of Tyre and Sidon, and passing to the confines of Decapolis, came back to the sea of Gallilee.

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
Jesus then quitting the confines of Tyre and Sidon, and passing to the confines of Decapolis, came back to the sea of Gallilee.
Matthew 4:25
and a great multitude of people followed him from Galilee, from Decapolis, from Jerusalem, from Judea, and from about Jordan.