Deuteronomy 7:22

And Jehovah your God will put out those nations before you by little and little. You may not destroy them at once, lest the beasts of the field increase upon you.

Exodus 23:29-30

I will not drive them out from before you in one year, lest the land become a waste, and the beast of the field multiply against you.

Joshua 15:63

As for the Jebusites, the inhabitants of Jerusalem, the sons of Judah could not drive them out. But the Jebusites live with the sons of Judah at Jerusalem to this day.

Treasury of Scripture Knowledge

Summary

And the LORD thy God will put out those nations before thee by little and little: thou mayest not consume them at once, lest the beasts of the field increase upon thee.

General references

Bible References

Thou mayest

Exodus 23:29
I will not drive them out from before you in one year, lest the land become a waste, and the beast of the field multiply against you.
Joshua 15:63
As for the Jebusites, the inhabitants of Jerusalem, the sons of Judah could not drive them out. But the Jebusites live with the sons of Judah at Jerusalem to this day.

General references

Deuteronomy 11:23
then Jehovah will drive out all these nations from before you, and you shall possess greater and mightier nations than you.
Joshua 21:44
And Jehovah gave them rest round about, according to all that He swore to their fathers. And not a man of all their enemies stood before them. Jehovah delivered all their enemies into their hand.