Deuteronomy 7:22 in the World English Bible
The LORD your God will cast out those nations before you little by little. You may not consume them at once, lest the animals of the field increase on you.
Context
21 Thou shalt not be affrighted at them: for the LORD thy God is among you, a mighty God and terrible.
22 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.
23 But the LORD thy God shall deliver them unto thee, and shall destroy them with a mighty destruction, until they be destroyed.