Now the sons of Ruben the firstborn of Israel, (for he was his firstborn: but forasmuch as he defiled his father's bed, his first birthright was given to the sons of Joseph the son of Israel, and he was not accounted for the firstborn.
Of Ruben the eldest son of Israel, by their generations and families and houses and names of every head, all that were of the male sex, from twenty years old and upward, that were able to go forth to war,
And when he dwelt in that country, Ruben went, and slept with Bala, the concubine of his father: which he was not ignorant of. Now the sons of Jacob were twelve.