Exodus 23:29

I will not drive them out before you in a single year, that the land may not become desolate and the beasts of the field become too numerous for you.

Deuteronomy 7:22

The Lord your God will clear away these nations before you little by little; you will not be able to put an end to them quickly, for the wild beasts would grow too numerous for you.

Joshua 15:63

Now as for the Jebusites, the inhabitants of Jerusalem, the sons of Judah could not drive them out; so the Jebusites live with the sons of Judah at Jerusalem until this day.

Joshua 16:10

But they did not drive out the Canaanites who lived in Gezer, so the Canaanites live in the midst of Ephraim to this day, and they became forced laborers.

Joshua 17:12-13

But the sons of Manasseh could not take possession of these cities, because the Canaanites persisted in living in that land.

Judges 3:1-4

Now these are the nations which the Lord left, to test Israel by them (that is, all who had not experienced any of the wars of Canaan;

Treasury of Scripture Knowledge

Summary

I will not drive them out from before thee in one year; lest the land become desolate, and the beast of the field multiply against thee.

Bible References

In one year

Deuteronomy 7:22
The Lord your God will clear away these nations before you little by little; you will not be able to put an end to them quickly, for the wild beasts would grow too numerous for you.
Joshua 15:63
Now as for the Jebusites, the inhabitants of Jerusalem, the sons of Judah could not drive them out; so the Jebusites live with the sons of Judah at Jerusalem until this day.
Joshua 16:10
But they did not drive out the Canaanites who lived in Gezer, so the Canaanites live in the midst of Ephraim to this day, and they became forced laborers.
Joshua 17:12
But the sons of Manasseh could not take possession of these cities, because the Canaanites persisted in living in that land.
Judges 3:1
Now these are the nations which the Lord left, to test Israel by them (that is, all who had not experienced any of the wars of Canaan;

General references

Deuteronomy 6:19
by driving out all your enemies from before you, as the Lord has spoken.
Deuteronomy 11:23
then the Lord will drive out all these nations from before you, and you will dispossess nations greater and mightier than you.
Deuteronomy 31:4
The Lord will do to them just as He did to Sihon and Og, the kings of the Amorites, and to their land, when He destroyed them.
Joshua 17:12
But the sons of Manasseh could not take possession of these cities, because the Canaanites persisted in living in that land.
Joshua 21:43
So the Lord gave Israel all the land which He had sworn to give to their fathers, and they possessed it and lived in it.