Albert Barnes Commentary Proverbs 21:30-31

"There is no wisdom nor understanding Nor counsel against Jehovah. The horse is prepared against the day of battle; But victory is of Jehovah." — Proverbs 21:30-31 (ASV)

Two companion proverbs. Nothing avails against, nothing without, God. The horse is the type of warlike strength, used chiefly or exclusively in battle. 1 Kings 4:26; 1 Kings 10:26–28, may be thought of as having given occasion to the latter of the two proverbs.