Exodus 23:29

I will not drive them out before you in a single year, so that the land does not become desolate [due to lack of attention] and the [wild] animals of the field do not 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 [if you did] the wild animals would become too numerous for you.

Joshua 15:63

But as for the Jebusites, the inhabitants of Jerusalem, the [tribe of the] sons of Judah were not able to drive them out; so the Jebusites live with the sons of Judah in Jerusalem to this day.

Joshua 16:10

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

Joshua 17:12-13

But the sons of Manasseh were not able to [drive out the inhabitants and] 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 [in order] to test Israel by them (that is, all [the people of Israel] who had not [previously] experienced any of the wars in 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 [if you did] the wild animals would become too numerous for you.
Joshua 15:63
But as for the Jebusites, the inhabitants of Jerusalem, the [tribe of the] sons of Judah were not able to drive them out; so the Jebusites live with the sons of Judah in Jerusalem to this day.
Joshua 16:10
But they did not drive out the Canaanites who lived in Gezer, so the Canaanites live among Ephraim to this day, and they became forced laborers.
Joshua 17:12
But the sons of Manasseh were not able to [drive out the inhabitants and] 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 [in order] to test Israel by them (that is, all [the people of Israel] who had not [previously] experienced any of the wars in 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 shall 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 were not able to [drive out the inhabitants and] 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 (ancestors), and they took possession of it and lived in it.