Rabanus Maurus

Furthermore, the time at which this slaughter of enemies was ordered to take place accords very well with the mystery of this spiritual slaughter, since the twelfth Hebrew month, which is Adar, can only symbolize the last age of our world when this spiritual war is being waged above all by the soldiers of Christ. And in the same way, the thirteenth day symbolizes the faith in the holy Trinity through the observing the commands of God, which is the basis upon which all our adversaries are effectively subdued.

Commentary on Esther ↗