“The smell of my son is as the smell of a full field which the Lord hath blessed: therefore God give thee of the dew of heaven, and of the fruitfulness of the earth, and plenty of corn and wine: let nations serve thee, and princes adore thee: and be lord of thy brethren, and let thy father’s sons adore thee: cursed be he that curseth thee, and blessed be he that blesseth thee.” The blessing of Jacob is therefore a proclamation of Christ to all nations. It is this which has come to pass, and is now being fulfilled. Isaac is the law and the prophecy: even by the mouth of the Jews Christ is blessed by prophecy as by one who knows not, because it is itself not understood. The world like a field is filled with the odor of Christ’s name: His is the blessing of the dew of heaven, that is, of the showers of divine words; and of the fruitfulness of the earth, that is, of the gathering together of the peoples: His is the plenty of corn and wine, that is, the multitude that gathers bread and wine in the sacrament of His body and blood. Him the nations serve, Him princes adore. He is the Lord of His brethren, because His people rules over the Jews. Him His Father’s sons adore, that is, the sons of Abraham according to faith; for He Himself is the son of Abraham according to the flesh. He is cursed that curseth Him, and he that blesseth Him is blessed.
–City Of God XVI.37
Israel, when dying in Egypt, in blessing his sons, prophetically blessed Judah. He says: “Judah, thy brethren shall praise thee: thy hands shall be on the back of thine enemies; thy father’s children shall adore thee. Judah is a lion’s whelp: from the sprouting, my son, thou art gone up: lying down, thou hast slept as a lion, and as a lion’s whelp; who shall awake him? A prince shall not be lacking out of Judah, and a leader from his thighs, until the things come that are laid up for him; and He shall be the expectation of the nations. Binding his foal unto the vine, and his ass’s foal to the choice vine; he shall wash his robe in wine, and his clothes in the blood of the grape: his eyes are red with wine, and his teeth are whiter than milk” …
The death of Christ is predicted by the word about his lying down, and not the necessity, but the voluntary character of His death, in the title of lion. That power He Himself proclaims in the gospel, saying, “I have the power of laying down my life, and I have the power of taking it again. No man taketh it from me; but I lay it down of myself, and take it again.” So the lion roared, so He fulfilled what He said. For to this power what is added about the resurrection refers, “Who shall awake him?” This means that no man but Himself has raised Him, who also said of His own body, “Destroy this temple, and in three days I will raise it up.” And the very nature of His death, that is, the height of the cross, is understood by the single words “Thou are gone up.” The evangelist explains what is added, “Lying down, thou hast slept,” when he says, “He bowed His head, and gave up the ghost.” Or at least His burial is to be understood, in which He lay down sleeping, and whence no man raised Him, as the prophets did some, and as He Himself did others; but He Himself rose up as if from sleep. As for His robe which He washes in wine, that is, cleanses from sin in His own blood, of which blood those who are baptized know the mystery, so that he adds, “And his clothes in the blood of the grape,” what is it but the Church? “And his eyes are red with wine,” [these are] His spiritual people drunken with His cup, of which the psalm sings, “And thy cup that makes drunken, how excellent it is!” “And his teeth are whiter than milk,” — that is, the nutritive words which, according to the apostle, the babes drink, being as yet unfit for solid food. And it is He in whom the promises of Judah were laid up, so that until they come, princes, that is, the kings of Israel, shall never be lacking out of Judah.
–City Of God XVI.41