Thomas Aquinas

God sometimes uses things like this for the correction of men, as we have already seen, "He judges the peoples with these things." (36:31) So he says, "These things which I have prepared for a time of the enemy," that is for a time when revenge must be taken on enemies. God uses these things against them like the arms of war, and so he says, "in the day of battle," that is, actual conflict, "and war," that is, wars in which one prepares for combat.

Commentary on Job ↗