Commentaries:
Jamieson, Fausset, and Brown
lest the beasts of the field increase upon thee—(See on Exodus 23:29). The omnipotence of their Almighty Ruler could have given them possession of the promised land at once. But, the unburied corpses of the enemy and the portions of the country that might have been left desolate for a while, would have drawn an influx of dangerous beasts. This evil would be prevented by a progressive conquest and by the use of ordinary means, which God would bless.
Thou shalt therefore keep the commandments, and the statutes, and the judgments, which I command thee this day—In the covenant into which God entered with Israel, He promised to bestow upon them a variety of blessings so long as they continued obedient to Him as their heavenly King. He pledged His veracity that His infinite perfections would be exerted for this purpose, as well as for delivering them from every evil to which, as a people, they would be exposed. That people accordingly were truly happy as a nation, and found every promise which the faithful God made to them amply fulfilled, so long as they adhered to that obedience which was required of them. See a beautiful illustration of this in Psalms 144:12-15.
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