1 Chronicles 6:67

6:67 They were allotted as cities of refuge Shechem and its pasturelands (in the hill country of Ephraim), Gezer and its pasturelands,

Joshua 16:10

16:10 The Ephraimites did not conquer the Canaanites living in Gezer. The Canaanites live among the Ephraimites to this very day and do hard labor as their servants.