TSK · Exodus 23:29

Yahweh your God will cast out those nations before you by little and little: you may not consume them at once, lest the animals of the field increase on you.

They didn't drive out the Canaanites who lived in Gezer; but the Canaanites dwell in the midst of Ephraim to this day, and have become servants to do forced labor.

Now these are the nations which Yahweh left, to prove Israel by them, even as many [of Israel] as had not known all the wars of Canaan;