1 Now the sons of Reuben the firstborn of Israel, (for he was the firstborn; but, forasmuch as he defiled his father's bed, his birthright was given unto the sons of Joseph the son of Israel: and the genealogy is not to be reckoned after the birthright. 2 For Judah prevailed above his brethren, and of him came the chief ruler; but the birthright was Joseph's:) 3 The sons, I say, of Reuben the firstborn of Israel were, Hannoch, and Pallu, Hezron, and Carmi. 4 The sons of Joel; Shemaiah his son, Gog his son, Shimei his son, 5 Micah his son, Reaia his son, Baal his son, 6 Beerah his son, whom Tilgath-pilneser king of Assyria carried away captive: he was prince of the Reubenites. 7 And his brethren by their families, when the genealogy of their generations was reckoned, were the chief, Jeiel, and Zechariah, 8 And Bela the son of Azaz, the son of Shema, the son of Joel, who dwelt in Aroer, even unto Nebo and Baal-meon: 9 And eastward he inhabited unto the entering in of the wilderness from the river Euphrates: because their cattle were multiplied in the land of Gilead. 10 And in the days of Saul they made war with the Hagarites, who fell by their hand: and they dwelt in their tents throughout all the east land of Gilead. 11 And the children of Gad dwelt over against them, in the land of Bashan unto Salchah: 12 Joel the chief, and Shapham the next, and Jaanai, and Shaphat in Bashan. 13 And their brethren of the house of their fathers were, Michael, and Meshullam, and Sheba, and Jorai, and Jachan, and Zia, and Heber, seven. 14 These are the children of Abihail the son of Huri, the son of Jaroah, the son of Gilead, the son of Michael, the son of Jeshishai, the son of Jahdo, the son of Buz; 15 Ahi the son of Abdiel, the son of Guni, chief of the house of their fathers. 16 And they dwelt in Gilead in Bashan, and in her towns, and in all the suburbs of Sharon, upon their borders. 17 All these were reckoned by genealogies in the days of Jotham king of Judah, and in the days of Jeroboam king of Israel. 18 The sons of Reuben, and the Gadites, and half the tribe of Manasseh, of valiant men, men able to bear buckler and sword, and to shoot with bow, and skilful in war, were four and forty thousand seven hundred and threescore, that went out to the war. 19 And they made war with the Hagarites, with Jetur, and Nephish, and Nodab. 20 And they were helped against them, and the Hagarites were delivered into their hand, and all that were with them: for they cried to God in the battle, and he was intreated of them; because they put their trust in him. 21 And they took away their cattle; of their camels fifty thousand, and of sheep two hundred and fifty thousand, and of asses two thousand, and of men an hundred thousand. 22 For there fell down many slain, because the war was of God. And they dwelt in their steads until the captivity. 23 And the children of the half tribe of Manasseh dwelt in the land: they increased from Bashan unto Baal-hermon and Senir, and unto mount Hermon. 24 And these were the heads of the house of their fathers, even Epher, and Ishi, and Eliel, and Azriel, and Jeremiah, and Hodaviah, and Jahdiel, mighty men of valour, famous men, and heads of the house of their fathers. 25 And they transgressed against the God of their fathers, and went a whoring after the gods of the people of the land, whom God destroyed before them. 26 And the God of Israel stirred up the spirit of Pul king of Assyria, and the spirit of Tilgath-pilneser king of Assyria, and he carried them away, even the Reubenites, and the Gadites, and the half tribe of Manasseh, and brought them unto Halah, and Habor, and Hara, and to the river Gozan, unto this day.
[AD 458] Theodoret of Cyrus on 1 Chronicles 1:1-10:14
There is abundant information in the books of Chronicles which were written to continue the books of the Kings and to preserve the memory of such important events. The first book begins with a genealogy that sets out to demonstrate how the human race came from a single man. Since it focuses only on the single kingdom of Judah, it can tell us about its cities and the villages, and from where they took their names. Here we come to know Nathan, from whom the blessed Luke constructed the beginning of his genealogy of our Lord and Savior, Son of David and Solomon’s brother4 on his mother’s side: “The following children were born to him in Jerusalem: Shimeah, Shobab, Nathan and Solomon, that is, the four children he fathered with Bersabea, daughter of Ammiel.” And Rechab6 herself, who is mentioned in many books of Scripture, is said to have come from the tribe of Judah.It also clearly explains why Reuben lost his birthright and Joseph gained it and also, finally, the reason why the tribe of Judah obtained the highest honor: “The sons of Reuben the firstborn of Israel. He was the firstborn, but because he defiled his father’s bed his birthright was given to the sons of Joseph son of Israel, so that he is not enrolled in the genealogy according to the birthright; though Judah became prominent among his brothers and a ruler came from him, yet the birthright belonged to Joseph.” It also explains the reason why such a great honor was conceded to Joseph. By the will of God Judah had the dignity of receiving the Lord who was born from him according to the flesh. This is the sense tacitly expressed with the words “a leader from him.” Indeed the passage seems to assert that not only the kings of the earth derived from Judah, but also the eternal king himself who had no beginning and will never end.
It also describes the situation of the tribes beyond the Jordan, those of Reuben and Gad, and even the tribes of Manasseh which later were received into those of the Hagarites and the Itureans, and talks about the tribes of the Naphiseans, and all those peoples who entered into conflict with them. In addition the text relates how they fought and won, and made the Hagarites flee. And it also reports the reason for the victory: “When they received help against them, the Hagarites and all who were with them were given into their hands, for they cried to God in the battle, and he granted their entreaty because they trusted in him.” It also describes the amount of the spoils of war: “They captured their livestock: 50, of their camels, 250, sheep, 2, donkeys and 100, captives. Many were slain because the war was from God. And they lived in their territory until the exile.”

[AD 458] Theodoret of Cyrus on 1 Chronicles 1:1-10:14
The genealogy of the priests and the Levites comes after this. It relates that Zadok, who was high priest at the time of David, had been the eleventh from Aaron; that Azariah, nephew of Zadok, had been the first to receive the priestly anointing in the temple built by Solomon. Among them there was also Jehozadak, who was brought to Babylon as a war prisoner. Jesus9 was his son, a high priest as well, who delivered the people from bondage together with Zerubbabel, and built a temple for the Lord. Here we also learn that Korah, who revolted against the great Moses, was a nephew of Isaar, son of Caath and brother of Amram, Aaron’s and Moses’ father. According to this lineage he was related to the first legislator. But he himself paid in the desert for his errors, although his children did not share the punishment of their father. From here Samuel13 came and then Aeman, who intoned Psalms and was a nephew of the prophet Samuel. In fact he was the son of Joel, son of Samuel. On the other hand, Asaph, one of the singers, came from the lineage of Gerson, son of Levi and brother of Caath. Aetham, who also belonged to the group of the singers, had Merari, the third son of Levi, as great-grandfather.The text also explains the difference between the priests and the Levites. It relates that the Levites were initiated into all the ministries of the holy altar of God: “But Aaron and his sons made offerings on the altar of burnt offering and on the altar of incense, doing all the work of the most holy place, to make atonement for Israel, according to all that Moses the servant of God had commanded.” It seems to me, in fact, that this book was written after the return from Babylon. For this reason it also talks about the bondage and explains its cause: “So all Israel was enrolled by genealogies; and these are written in the book of the Kings of Israel. And Judah was taken into exile in Babylon because of their unfaithfulness. Now the first to live again in their possessions in their towns were Israelites, priests, Levites, and temple servants.” These accounts show that the book was begun after the captivity. Indeed no historian ever relates facts that happened afterwards, but what happened before or during his times. And actually only the prophets have the power to foretell the future. In addition it says that also those who had inhabited that land before them had been enslaved. And actually many of them still live with them: the Canaanites, Chettites, Jebusites, who had been their companions in such a misfortune. Also the priests and the Levites were brought into captivity with the Israelites. I believe that those who were called “the saints’ servants” were then called Nathinim. Many of them, in fact, consecrated themselves to the ministries of the priests and the Levites. There were among them also those who were entrusted with the carrying of the water, the gathering of wood and other necessary duties. Indeed, if it was imposed to the Gabaonites, who were foreigners, to follow Joshua in the praises and to perform some works as porters or carpenters, this task was even more the duty of the Israelites. As a proof of this I have found in the interpretation of Hebrew names that this name means “house of Iaō,” that is, “of the God who is.” The text, in fact, mentions the children of Israel and among them Judah and Benjamin, and Ephraim18 and Manasseh. It also mentions the priests and the Levites, who inhabited those cities. About the Korēnites it says that they derived from Korah. It also says that among them there had been the guardians of the temple of God as well, and it seems that this custom had been introduced by Samuel and David. “All these, who were chosen as gatekeepers at the thresholds, were two hundred twelve. They were enrolled by genealogies in their villages. David and the prophet Samuel established them in their office of trust. So they and their descendants were in charge of the gates of the house of the Lord, that is, the house of the tent, as guards. The gatekeepers were on the four sides, east, west, north, and south.”

[AD 458] Theodoret of Cyrus on 1 Chronicles 1:1-10:14
The Chronicles also speak about the tabernacle because a temple of the Lord had not yet been built by either Samuel or David. The text also adds that that the holy services were held in the tabernacle. Worship was observed at that time according to the number of the days of the week. For it also says, “and their kindred who were in their villages were obliged to come in every seven days, in turn, to be with them.” With regard to the holy utensils it says, “Some of them had charge of the utensils of service, for they were required to count them when they were brought in and taken out. Others of them were appointed over the furniture, and over all the holy utensils, also over the choice flour, the wine, the oil, the incense and the spices.” And about the priests it says, “Others, of the sons of the priests, prepared the mixing of the spices.” With regard to the tomb of Saul the Chronicles gives us much information, and in the Book of Kings itself we read that his bones were gathered and buried in the land of Jabesh.

[AD 1781] Richard Challoner on 1 Chronicles 5:2
Accounted to Joseph: That is, as to the double portion, which belonged to the firstborn; but the princely dignity was given to Juda, and the priesthood to Levi.