Behold a son!, the eldest son of Jacob and Leah (Gen. 29:32). His sinful conduct, referred to in Gen. 35:22, brought down upon him his dying father’s malediction (48:4). He showed kindness to Joseph, and was the means of saving his life when his other brothers would have put him to death (37:21,22). It was he also who pledged his life and the life of his sons when Jacob was unwilling to let Benjamin go down into Egypt. After Jacob and his family went down into Egypt (46:8) no further mention is made of Reuben beyond what is recorded in ch. 49:3,4.
Reuben
Reuben was Jacob’s firstborn, and his story is one of promise that does not quite hold. Leah named him in hope: “Surely the LORD hath looked upon my affliction.” Years later he tried to rescue Joseph, saying “Shed no blood,” and came back to the empty pit and “rent his clothes.” Genesis also records his wrong against his father, and Jacob’s blessing says, “Unstable as water, thou shalt not excel.” His sons are listed in Genesis, Exodus and Chronicles. Genesis 37 is the best-known scene.
20 verses
Genesis
And Leah conceived, and bare a son, and she called his name Reuben: for she said, Surely the LORD hath looked upon my affliction; now therefore my husband will love me.
And it came to pass, when Israel dwelt in that land, that Reuben went and lay with Bilhah his father's concubine: and Israel heard it. Now the sons of Jacob were twelve:
And Reuben heard it, and he delivered him out of their hands; and said, Let us not kill him.
And Reuben said unto them, Shed no blood, but cast him into this pit that is in the wilderness, and lay no hand upon him; that he might rid him out of their hands, to deliver him to his father again.
And it came to pass, when Joseph was come unto his brethren, that they stript Joseph out of his coat, his coat of many colours that was on him;
And they took him, and cast him into a pit: and the pit was empty, there was no water in it.
And they sat down to eat bread: and they lifted up their eyes and looked, and, behold, a company of Ishmeelites came from Gilead with their camels bearing spicery and balm and myrrh, going to carry it down to Egypt.
And Judah said unto his brethren, What profit is it if we slay our brother, and conceal his blood?
Come, and let us sell him to the Ishmeelites, and let not our hand be upon him; for he is our brother and our flesh. And his brethren were content.
Then there passed by Midianites merchantmen; and they drew and lifted up Joseph out of the pit, and sold Joseph to the Ishmeelites for twenty pieces of silver: and they brought Joseph into Egypt.
And Reuben returned unto the pit; and, behold, Joseph was not in the pit; and he rent his clothes.
And he returned unto his brethren, and said, The child is not; and I, whither shall I go?
And the sons of Reuben; Hanoch, and Phallu, and Hezron, and Carmi.
Unstable as water, thou shalt not excel; because thou wentest up to thy father's bed; then defiledst thou it: he went up to my couch.
Exodus
These be the heads of their fathers' houses: The sons of Reuben the firstborn of Israel; Hanoch, and Pallu, Hezron, and Carmi: these be the families of Reuben.
Numbers
Now Korah, the son of Izhar, the son of Kohath, the son of Levi, and Dathan and Abiram, the sons of Eliab, and On, the son of Peleth, sons of Reuben, took men:
1 Chronicles
The sons, I say, of Reuben the firstborn of Israel were, Hanoch, and Pallu, Hezron, and Carmi.
The sons of Joel; Shemaiah his son, Gog his son, Shimei his son,
Micah his son, Reaia his son, Baal his son,
Beerah his son, whom Tilgathpilneser king of Assyria carried away captive: he was prince of the Reubenites.
From Easton's Bible Dictionary
Matthew George Easton, 1897