'Walled' in the Bible

And the gold mice, one for every town of the Philistines, the property of the five lords, walled towns as well as country places: and the great stone where they put the ark of the Lord is still in the field of Joshua the Beth-shemite to this day.

And news was given to Saul that David had come to Keilah. And Saul said, Now God has given him into my hands; for by going into a walled town with locked doors, he has let himself be shut in.