Adam Clarke's Commentary on the Bible - Proverbs 21:31
The horse is prepared against the day of battle - Horses were not used among the Jews before the time of Solomon. There was a Divine command against them, Deuteronomy 17:16 ; but Solomon transgressed it; see 1 Kings 10:29 . But he here allows that a horse is a vain thing for safety; and that however strong and well appointed cavalry may be, still safety, escape, and victory, are of the Lord. Among the ancient Asiatics, the horse was used only for war; oxen labored in the plough and cart,... read more
John Gills Exposition of the Bible Commentary - Proverbs 21:31
The horse is prepared against the day of battle ,.... The horse is a warlike creature, and was much used formerly, as now, in war; these are prepared against the day of battle, to mount the cavalry with; and men are apt to put too great confidence in them: this is mentioned instead of all other military preparations and instruments of war; but safety is of the Lord ; a horse is a vain thing for safety, Psalm 33:17 ; victory is only of the Lord; salvation depends upon him; it is he... read more