Ambrose of Milan

And therefore the spear of sinners will enter into their hearts, and their bow will be broken. Just as peace returns to the servants of God from those who do not receive the blessed peace, so too the wickedness of sinners, with which they try to harm the righteous, will turn back to their own destruction; so that they may be killed by their own weapons and wounds. For often the javelins are thrown back upon those who threw them. …

Commentaries on the Twelve Davidic Psalms ↗