Matthew Henry on 1 Chronicles 5:1-17
We have here an extract out of the genealogies,
I. Of the tribe of Reuben, where we have,
1. The reason why this tribe is thus postponed. It is confessed that Reuben was the first-born of Israel, and, upon that account, might challenge the precedency; but he forfeited his birthright by defiling his father's concubine, and was, for that, sentenced not to excel, Gen 49:4. Sin lessens men, thrusts them down from their excellency. Seventh-commandment sins especially leave an indelible stain upon men's names and families, a reproach which time will not wipe away. Reuben's seed, to the last, bear the disgrace of Reuben's sin. Yet, though that tribe was degraded, it was not discarded or disinherite…
Read the whole note in the consoleJamieson-Fausset-Brown on 1 Chronicles 5:9
Eastward he inhabited unto the entering in of the wilderness from the river Euphrates--The settlement was on the east of Jordan, and the history of this tribe, which never took any part in the public affairs or movements of the nation, is comprised in "the multiplication of their cattle in the land of Gilead," in their wars with the Bedouin sons of Hagar, and in the simple labors of pastoral life. They had the right of pasture over an extensive mountain range--the great wilderness of Kedemoth (Deu 2:26) and the Euphrates being a security against their enemies.
Adam Clarke on 1 Chronicles 5:8
Who dwelt in Aroer - This town was situated on the river Arnon; and Nebo was both a city and a mountain in the same country. They both lay on the other side of Jordan.
John Gill on 1 Chronicles 5:9
And eastward he inhabited,.... Either Bela, or the tribe of Reuben:
unto the entering in of the wilderness; the wilderness of Kedemoth, which was near to Sihon king of Heshbon, whose land the Reubenites inhabited, Deuteronomy 2:26.
from the river Euphrates; a learned man (r) thinks that this river Phrat was different from the Euphrates near Babylon, which was northward, since this was to the east or southeast:
because their cattle were multiplied in the land of Gilead; therefore their habitation was extended further, even to the river Euphrates, as in the days of David and Solomon, 2 Samuel 8:3.
(r) Texelii Phoenix, l. 3. c. 7. p. 272.