Joshua 16:3, 10

and it went down westward to the border of the Japhletites, unto the border of Beth-horon the nether, even unto Gezer; and the goings out thereof were at the sea.

And they drove not out the Canaanites that dwelt in Gezer: but the Canaanites dwell in the midst of Ephraim unto this day, and are become servants to do taskwork.