Charles Ellicott Commentary Exodus 23:29

"I will not drive them out from before thee in one year, lest the land become desolate, and the beasts of the field multiply against thee." — Exodus 23:29 (ASV)

The beast of the field. Compare 2 Kings 17:25–26, where we find that this result followed the deportation of the Samaritans by the Assyrians.