On Genesis
And in saying, moreover, that Zabulun will dwell by the sea, he speaks prophetically of his territory as bordering on the sea, and of Israel as mingling with the Gentiles, the two nations being brought as it were into one flock. And this is manifest in the Gospel. “The land of Zabulun, and the land of Nephthalim,” etc. And you will mark more fully the richness of his lot as having both inland territory and seaboard.
“And he is by a haven of ships;”that is, as in a safe anchorage, referring to Christ, the anchor of hope. And this denotes the calling of the Gentiles— that the grace of Christ shall go forth to the whole earth and sea. For he says, “And (he is) by a haven of ships, and shall extend as far as Sidon.” And that this is said prophetically of the Church of the Gentiles, is made apparent to us in the Gospel: “The land of Zabulun, and the land of Nephthalim, by the way of the sea, beyond Jordan, Galilee of the Gentiles; the people which sat in darkness saw great light.” In saying, then, that he, namely Zabulun, would inhabit a territory bordering on the sea, he plainly confirmed that, just as if he had said that in the future Israel would mingle with the Gentiles, the two peoples being brought together into one fold and under the hand of one chief Shepherd, the good (Shepherd) by nature, that is, Christ. In blessing him Moses said, “Zabulun shall rejoice.” And Moses prophesies, that in the allocation of the land he should have abundance ministered of the good things both of land and sea, under the hand of One. “By a haven of ships;”that is, as in an anchorage that proves safe, referring to Christ, the anchor of hope. For by His grace he shall come forth out of many a tempest, and shall be brought hereafter to land, like ships secure in harbours. Besides, he said that “he extends as far even as Sidon,” indicating, as it seems, that so complete a unity will be effected in the spirit's course between the two peoples, that those of the blood of Israel shall occupy those very cities which once were exceeding guilty in the sight of God.
After something from Cyril:
HIPPOLYTUS: And “that the land was fat;”that is, the flesh of our Lord: “fat,” that is, “rich;”for it flows with honey and milk. The parts of the land are marked off for an inheritance and possession to him— that means the doctrine of the Lord. For this is a pleasant rest, as He says Himself: “Come unto me, all you that labour and are heavy laden,” etc. For they who keep the commandments, and do not disclaim the ordinances of the law, enjoy rest both in them and in the doctrine of our Lord; and that is the meaning of “in the midst of the lots.” As the Lord says, “I am not come to destroy the law and the prophets, but to fulfil them.” For even our Lord, in the fact that He keeps the commandments, does not destroy the law and the prophets, but fulfils them, as He says in the Gospels. “He set his shoulder to toil, and became a husbandman.” This the apostles did. Having received power from God, and having set themselves to labour, they became husbandmen of the Lord, cultivating the earth— that is, the human race— with the preaching of our Lord.
Genesis 49:16-20
Dan shall judge his people, as himself also one tribe in Israel. And let Dan become a serpent by the way, lying on the path, stinging the horse's heel; and the horseman shall fall backward, waiting for the salvation of the Lord. Gad— a robber's troop shall rob him; and he shall spoil it at the heels. Aser— his bread shall be fat, and he shall furnish dainties to princes.
After something from Cyril, Apollinaris, and Diodorus:—
HIPPOLYTUS: The Lord is represented to us as a horseman; and the “heel” points us to the “last times.” And His “falling” denotes His death; as it is written in the Gospel: “Behold, this (child) is set for the fall and rising again of many.” We take the “robber” to be the traitor. Nor was there any other traitor to the Lord save the (Jewish) people. “Shall rob him,” i.e., shall plot against him. At the heels: that refers to the help of the Lord against those who lie in wait against Him. And again, the words “at the heels” denote that the Lord will take vengeance swiftly. He shall be well armed in the foot (heel), and shall overtake and rob the robber's troop.
AQUILA: “Girded, he shall gird himself;”that means that as a man of arms and war he shall arm himself. “And he shall be armed in the heel:”he means this rather, that Gad shall follow behind his brethren in arms. For though his lot was beyond Jordan, yet they (the men of that tribe) were enjoined to follow their brethren in arms until they too got their lots. Or perhaps he meant this, that Gad's tribesmen were to live in the mummer of robbers, and that he was to take up a confederacy of freebooters, which is just a “robber's troop,” and to follow them, practising piracy, which is robbery, along with them.
Whereas, on the abolition of the shadow in the law, and the introduction of the worship in spirit and truth, the world had need of greater light, at last, with this object, the inspired disciples were called, and put in possession of the lot of the teachers of the law. For thus did God speak with regard to the mother of the Jews— that is to say, Jerusalem— by the voice of the Psalmist: “Instead of your fathers were your sons;” that is, to those called your sons was given the position of fathers. And with regard to our Lord Jesus Christ in particular: “You will appoint them rulers over all the earth.” Yet presently their authority will not be by any means void of trouble to them. Nay rather, they were to experience unnumbered ills and they were to be in perplexity; and the course of their apostleship they were by no means to find free of peril, as he intimated indeed by way of an example, when he said, “Let (Dan) be,” meaning by that, that there shall be a multitude of persecutors in Dan like a “serpent lying by the way on the path, stinging the horse's heel,” i.e., giving fierce and dangerous bites; for the bites of snakes are generally very dangerous. And they were “in the heel” in particular. for “he shall bruise your head, and you shall bruise his heel.” And some did persecute the holy apostles in this way even to the death of the flesh. And thus we may say that their position was something like that when a horse stumbles and flings out his heels. For in such a case the horseman will be thrown, and, falling to the ground, I suppose, he waits thus for some one alive. And thus, too, the inspired apostles survive and wait for the time of their redemption, when they shall be called into a kingdom which cannot be moved, when Christ addresses them with the word, Come, you blessed of my Father, ' etc.
And again, if any one will take the words as meaning, not that there will be some lying in wait against Dan like serpents, but that this Dan himself lies in wait against others, we may say that those meant thereby are the scribes and Pharisees, hypocrites who, while in possession of the power of judgment and instruction among the people, fastened like snakes upon Christ, and strove impiously to compass His fall, vexing Him with their stings as He held on in His lofty and gentle course. But if that horseman did indeed fall, He fell at least of His own will, voluntarily enduring the death of the flesh. And, moreover, it was destined that He should come to life again, having the Father as His helper and conductor. For the Son, being the power of God the Father, endued the temple of His own body again with life. Thus is He said to have been saved by the Father, as He stood in peril as a man, though by nature He is God, and Himself maintains the whole creation, visible and invisible, in a state of wellbeing. In this sense, also, the inspired Paul says of Him: “Though He was crucified in weakness, yet He lives by the power of God.”
Source: Some Exegetical Fragments of Hippolytus (New Advent)