Bible Verses About Reuben: Commits incest with one of his father's concubines, and, in consequence, forfeits the birthright

And it came to pass, while Israel dwelt in that land, that Reuben went and lay with Bilhah his father’s concubine: and Israel heard of it. Now the sons of Jacob were twelve:

Boiling over as water, thou shalt not have the pre-eminence; Because thou wentest up to thy father’s bed; Then defiledst thou it: he went up to my couch.

And the sons of Reuben the first-born of Israel (for he was the first-born; but, forasmuch as he defiled his father’s couch, his birthright was given unto the sons of Joseph the son of Israel; and the genealogy is not to be reckoned after the birthright.