(Chapter 16, Verse 1) Send forth the Lamb, the ruler of the earth, from the desert rock to the mountain of the daughter of Zion. This, we interpret, is not history, but prophecy. However, every prophecy is wrapped in riddles and, with interrupted sentences, while speaking of one thing, goes on to another: lest if it preserves the order of Scripture, it be not a prophecy, but a narrative. And the meaning is: O Moab, over whom the lion will rage, and from whom not even remnants will be able to be saved, take solace in this: The Immaculate Lamb will come forth from you, who will take away the sins of the world, who will rule over the whole earth. From the rock of the desert, that is, from Ruth, who, widowed by the death of her husband, bore Obed and from Obed, Jesse, and from Jesse, David, and from David, Christ. But by the mountain of the daughters of Zion, we shall interpret either the city itself, Jerusalem, or according to the sacred understanding, the Church, which is established on the summit of virtues.
(Chapter XVI—Verse 1) Send forth the lamb, the ruler of the earth, from the rock of the desert, to the mountain of the daughter of Zion. And it shall be like a flying bird, and the chicks flying from the nest. So shall the daughters of Moab be in the crossing of the Arnon. Plan a counsel, gather a counsel, place your shadow like the night at midday. Hide the fugitives, and do not betray the wanderers. My outcasts shall dwell with you, Moab shall be their shelter from the face of the devastator. For the dust is ended, the wretched one is consumed, the one who trampled the earth has ceased. And a throne will be established in mercy: and he will sit upon it in truth in the tabernacle of David: judging and seeking judgment; and quickly rendering what is just. This is what we have interpreted from the Hebrew: send forth the lamb, the ruler of the earth, it can be read as follows: send forth the lamb to the ruler of the earth, in which case the lamb himself is not the ruler of the earth, as we have interpreted according to the history, but the lamb is to be sacrificed to the ruler of the earth. Therefore, this lamb, who either is the ruler of the earth or is sacrificed to the ruler of the earth, is from the nation of the Moabites, and from those who fled from Moab, and deserve to have the Prince be a lion. But Ruth, from whom Christ is born (Matt. 1:5), signifies the rock of the desert, because according to God's command, the Moabites and Ammonites do not enter the Church of God until the tenth generation, and not forever (Deut. 1). But whoever flees from the desert of Moab, so that we may return from prophecy to anagoge, and having disregarded falsehood, stands on the mountain of truth, will be like a flying bird; and like young birds flying from the nest, lest they be devoured by Moabite serpents. Thus, he says, all the daughters, that is, the Moabite souls, will be in the crossing of the Arnon, which is interpreted as their enlightenment: when they have abandoned errors and transcended to the knowledge of truth. Therefore, it is said to Moab itself, or to one who has escaped from Moab: Do nothing without counsel (Prov. XIII): Do not be carried about by every wind of doctrine, but follow him who is the great counselor Angel (Ephes. IV): And gather a council, so that out of the wanderers and strays you may make the Church of God. But your shadow and tent, in which you used to believe you found rest, which was of the night and darkness, put in the midday, that is, in the brightest light, in which you should hide those who flee from error, and not reveal the wanderers anymore. O Moab, my fugitive ones, who abandoned me, who had left the Church, and rejecting the teaching of the Holy Spirit, followed their own understanding; or those who had dwelt among you, when the devouring devil began to persecute them, you offer them refuge turned toward the fear of the Lord with your whole heart: and know that after the coming of the Lamb, who arose from the rock of the desert, the ruler of the whole earth; and He came to the mountain of the daughter of Zion, all the power of the devil, which is compared to dust, will come to an end. And the wretched one who made many wretched has been consumed, and the one who trampled on all the earth has fallen, those who became worldly. But with him consumed and reduced to nothingness, and completely depleted, a throne and eternal kingdom will be prepared. First in mercy (for we are all under sin: and we need the grace of God); and he will sit in the tabernacle of David, which had fallen and was raised up, who will judge after mercy, and seek justice, and render to each according to their works. Let us consider at the beginning either the burden or the discourse of Moab, in which it is said: 'In the night Ar Moab is laid waste' and so on until this place; and we will see how, by gradual steps and in order of repentance, the Moabites become Israelites: and they will flee like birds and fly like fledglings from the nest, to go beyond the Arnon and dwell on the mountain of the daughter of Zion: and with every power of the devil or Antichrist crushed, Christ will reign in them, and may He establish His throne for those who are saved by mercy and justice. For the Father does not judge anyone, but He has given all judgment to the Son (John 5).
[AD 420] Jerome on Isaiah 16:1