Then I went to the Euphrates, and dug, and took the belt from the place where I had hid it: and, behold, the belt was ruined, it was profitable for nothing.
Read Chapter 13
Jerome
AD 420
The reversed order, however, furnishes a clue for our exegesis. “The Lord is king, in splendor robed.” The Lord is king, and he is robed in the splendor of patriarchs and prophets and a people that believes. He is robed in splendor. The patriarchs and prophets have been as the garment of Christ. They are the loincloth mentioned in Jeremiah—the girdle that he wore about his loins. Do you know that the saints are like a girdle and the vestment of God? God says to Jeremiah, “As close as the loincloth clings to a man’s loins, so had I made my people cling to me.” God’s people are as close to him as person’s clothing is to his body. - "Homilies on the Psalms 26 (Ps 98)"
The girdle, or loincloth, which is attached to the loins of God, is the people of Israel, who, like this piece of linen, were assumed from the earth unwashed and having no softness or beauty, yet were nevertheless joined to God through his mercy. When Israel sinned (which is why it was represented as a loincloth), it was led across the Euphrates and Assyria and there hidden, that is, absorbed, in a manner of speaking, into the crowd of larger and innumerable peoples and from captivity. Despite this, they did not observe the precepts of God after they were restored but went after other gods in the extreme, even raising their hand against the Son of God, and then they wasted away in everlasting perdition. God’s loincloth is also every holy person who is assumed from the earth, even from the dust of the earth, and united to God as a companion, who, in a certain way, surrounds and covers with greater diligence the things that appear in God’s church to be indecent, lest they become vulnerab...
We are the robe of Christ. When we have clothed him with our confession of faith, we, in turn, have put on Christ. It is the apostle who says that Christ is our robe, for when we are baptized, we put on Christ. We both clothe and are clothed. Would you like to know in what manner we clothe the Lord? We read in Jeremiah: “Go buy yourself a linen loincloth. Wear it on your loins, and go to the Euphrates. There hide it in a cleft of the rock. Obedient to the Lord’s command, I went to the Euphrates and buried the loincloth. After a long interval, again I went to the Euphrates, and the loincloth was rotted, good for nothing. Then the message came to me from the Lord: ‘Listen very carefully. As close as the loincloth clings to your loins, so had I made this people cling to me,’ says the Lord.” Why have I drawn this out to such length? To prove to you that the faithful are the garment of Christ. - "Homilies on the Psalms 45 (Ps 132)"
Yet such is the order of nature. While truth is always bitter, pleasantness waits upon evildoing. Isaiah goes naked without blushing, as a type of the captivity to come. Jeremiah is sent from Jerusalem to the Euphrates (a river in Mesopotamia) and leaves his girdle to be marred in the Chaldaean camp, among the Assyrians hostile to his people. Ezekiel is told to eat bread made of mingled seeds and baked over the dung of people and cattle. He is commanded to experience the death of his wife without shedding a tear. Amos is driven from Samaria. Why is he driven from it? Surely in this case, as in the others, because he was a spiritual surgeon who cut away the parts diseased by sin and urged people to repentance. The apostle Paul says, “Am I therefore become your enemy because I tell you the truth?” And so the Savior found it, from whom many of the disciples turned back from following him because his sayings seemed hard. - "Letter 40.1"