Further, Jacob’s firstborn, Reuben, had lain down with his father’s concubine, disgracing his father and effectively forfeiting his own birthright. ​ — Genesis 35: 22; 49: 3, 4.
Peale selle oli Jaakobi esmasündinud poeg Ruuben maganud oma isa liignaisega, teotades oma isa ja jäädes seetõttu ilma esmasünniõigusest.