Genesis 49:4 But because you were uncontrolled, the first place will not be yours; for you went up to your father's bed, even his bride-bed, and made it unclean. (BBE)
1 Chronicles 5:1 And the sons of Reuben, the oldest son of Israel, (for he was the oldest son, but, because he made his father's bride-bed unclean, his birthright was given to the sons of Joseph, the son of Israel; but he is not to be given the place of the oldest. (BBE)