And that we may know that this voice of God came forth with His true and highest majesty to honour and avenge His priests; when three of the ministers -Korah, Dathan, and Abiram-dared to deal proudly, and to exalt their neck against Aaron the priest, and to equal themselves with the priest set over them; they were swallowed up and devoured by the opening of the earth, and so immediately suffered the penalty of their sacrilegious audacity. Nor they alone, but also two hundred and fifty others, who were their companions in boldness, were consumed by a fire breaking forth from the Lord, that it might be proved that God's priests are avenged by Him who makes priests. In the book of Kings also, when Samuel the priest was despised by the Jewish people on account of his age, as you are now, the Lord in wrath exclaimed, and said, "They have not rejected thee, but they have rejected me." And that He might avenge this, He set over them Saul as a king, who afflicted them with grievous injuries, and trod on the people, and pressed down their pride with all insults and penalties, that the despised priest might he avenged by divine vengeance on a proud people.
Source: Epistle LXIV