Justin Martyr, First Apology 32

Moses, the first of the prophets, spoke these exact words: "A ruler will not cease from Judah, nor a leader from his line, until the one to whom it is reserved arrives; and he will be the expectation of the nations, tethering his colt to a vine and washing his robe in the blood of the grape" (Genesis 49:10). It is your task to examine carefully and learn until what time the Jews had a ruler and king of their own; that time lasted until the appearance of Jesus Christ, our teacher and the interpreter of the obscure prophecies, just as the divine Holy Spirit foretold through Moses that a ruler would not cease from the Jews until the one to whom the kingdom is reserved should come. For Judah was the forefather of the Jews, and from him they received the very name 'Jews'; and after his manifestation you ruled the Jews and seized possession of all their land. The statement "He will be the expectation of the nations" was a sign that all nations would await his return, and you now have the opportunity to witness this and be convinced by the fact itself; for people from every nation expect the one who was crucified in Judea, after whose death the land of the Jews was immediately handed over to you as a conquered territory.

The phrase "Tethering his colt to a vine and washing his robe in the blood of the grape" was a symbolic declaration of what would happen to Christ and what he would accomplish. A certain donkey's colt stood tied to a vine at a village entrance; he ordered his acquaintances to bring it to him, and when it was brought he mounted it, sat upon it, and entered Jerusalem, where the great temple of the Jews stood, which you later destroyed; and after these things he was crucified, so that the rest of the prophecy might be fulfilled. For the words "Washing his robe in the blood of the grape" foretold the passion he would endure, cleansing those who believe in him through his blood. The robe, spoken of by the divine Spirit through the prophet, represents the people who believe in him, in whom the seed from God, the Word, dwells. The mentioned blood of the grape signifies that the one who appeared possesses blood, yet not from human seed but from divine power. The first power after the Father of all and Lord God is the Word, the Son; who, having become flesh, became a man — a matter we will discuss later. For just as the blood of the grape is not produced by a human but by God, so it was indicated that his blood would not come from human seed but from the power of God, as we foretold.

And Isaiah, another prophet, prophesying the same things through different words, declared: "A star will rise from Jacob, and a shoot will spring from the root of Jesse; and the nations will hope in his arm" (Isaiah 11:1). A bright star has risen, and a flower has bloomed from the root of Jesse — this is the Christ. For through a virgin descended from the seed of Jacob, who became the father of Judah, who was designated the father of the Jews, he was born by the power of God; and Jesse became a forefather according to the oracle, while also standing as a son in the line of descent from Jacob and Judah.