The birthright is emphasized in the Bible because it honored the rights or privileges of the family’s firstborn son. After the father died, or in the father’s absence, the firstborn son assumed the father’s authority and responsibilities. However, the Bible also shows that the father could rescind the birthright and pass it on to a younger son. A good example of this is the case of Jacob and his twelve sons. Reuben was the eldest, but the birthright was given to Joseph’s sons. Even then, Jacob blessed the younger son, Ephraim, above the elder, Manasseh (Genesis 37:19-22; Genesis 49:1-4; Genesis 49:22-26).