Reference: Tribes Of Israel
Hastings
The number of the tribes of Israel varied at different periods. The number 12 is an artificial one, as is seen from its application to the descendants of Ishmael (Ge 17:20; 25:13-15), of Nahor (Ge 22:20-24), and of Esau (Ge 36:15-19,40-43). Simeon and Levi were 'divided in Jacob and scattered in Israel' (Ge 49:7) when the tribe of Benjamin arose, so that at that time there would be not 12 but only 11 tribes. Reuben, likewise, in the period of the kings, was an insignificant remnant, and, though mentioned in 1Ch 5:26 as still existing in 734, had apparently become disintegrated long before. As Stade (VI Geschichte des Volkes Israel i. 146) correctly remarks, several of the largest tribes
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"As for Ishmael, I have heard you; behold, I will bless him, and will make him fruitful and will multiply him exceedingly He shall become the father of twelve princes, and I will make him a great nation.
Now it came about after these things, that it was told Abraham, saying, "Behold, Milcah also has borne children to your brother Nahor: Uz his firstborn and Buz his brother and Kemuel the father of Aram read more. and Chesed and Hazo and Pildash and Jidlaph and Bethuel." Bethuel became the father of Rebekah; these eight Milcah bore to Nahor, Abraham's brother. His concubine, whose name was Reumah, also bore Tebah and Gaham and Tahash and Maacah.
and these are the names of the sons of Ishmael, by their names, in the order of their birth: Nebaioth, the firstborn of Ishmael, and Kedar and Adbeel and Mibsam and Mishma and Dumah and Massa, read more. Hadad and Tema, Jetur, Naphish and Kedemah.
Then they journeyed from Bethel; and when there was still some distance to go to Ephrath, Rachel began to give birth and she suffered severe labor. When she was in severe labor the midwife said to her, "Do not fear, for now you have another son." read more. It came about as her soul was departing (for she died), that she named him Ben-oni; but his father called him Benjamin. So Rachel died and was buried on the way to Ephrath (that is, Bethlehem). Jacob set up a pillar over her grave; that is the pillar of Rachel's grave to this day.
These are the chiefs of the sons of Esau. The sons of Eliphaz, the firstborn of Esau, are chief Teman, chief Omar, chief Zepho, chief Kenaz, chief Korah, chief Gatam, chief Amalek. These are the chiefs descended from Eliphaz in the land of Edom; these are the sons of Adah. read more. These are the sons of Reuel, Esau's son: chief Nahath, chief Zerah, chief Shammah, chief Mizzah. These are the chiefs descended from Reuel in the land of Edom; these are the sons of Esau's wife Basemath. These are the sons of Esau's wife Oholibamah: chief Jeush, chief Jalam, chief Korah. These are the chiefs descended from Esau's wife Oholibamah, the daughter of Anah. These are the sons of Esau (that is, Edom), and these are their chiefs.
Now these are the names of the chiefs descended from Esau, according to their families and their localities, by their names: chief Timna, chief Alvah, chief Jetheth, chief Oholibamah, chief Elah, chief Pinon, read more. chief Kenaz, chief Teman, chief Mibzar, chief Magdiel, chief Iram. These are the chiefs of Edom (that is, Esau, the father of the Edomites), according to their habitations in the land of their possession.
"Cursed be their anger, for it is fierce; And their wrath, for it is cruel. I will disperse them in Jacob, And scatter them in Israel.
Now it came about after the death of Joshua that the sons of Israel inquired of the LORD, saying, "Who shall go up first for us against the Canaanites, to fight against them?"
Likewise the house of Joseph went up against Bethel, and the LORD was with them.
Solomon had twelve deputies over all Israel, who provided for the king and his household; each man had to provide for a month in the year.
Now the sons of Reuben the firstborn of Israel (for he was the firstborn, but because he defiled his father's bed, his birthright was given to the sons of Joseph the son of Israel; so that he is not enrolled in the genealogy according to the birthright. Though Judah prevailed over his brothers, and from him came the leader, yet the birthright belonged to Joseph),
So the God of Israel stirred up the spirit of Pul, king of Assyria, even the spirit of Tilgath-pilneser king of Assyria, and he carried them away into exile, namely the Reubenites, the Gadites and the half-tribe of Manasseh, and brought them to Halah, Habor, Hara and to the river of Gozan, to this day.