“The wicked draw the sword and bend their bows to bring down the poor and needy, to slay those whose way is upright; their sword shall enter their own heart, and their bows shall be broken.” -Psalm 37:14–15
Along with the next parallelism in verse 16-17, we have another expression of poetic justice. War and husbandry were both ordinary and common experiences of that time. Victory in battle was a sign of God’s favor as was harvesting a bumper crop.
In this scenario, David describes the judgment of God on the wicked as their weapons of warfare, having been raised against the innocent, being turned back on themselves and broken.
“no weapon that is fashioned against you shall succeed, and you shall refute every tongue that rises against you in judgment. This is the heritage of the servants of the Lord and their vindication from me, declares the Lord.”” -Isaiah 54:17