After much discussion and anger, the brothers try to get Benjamin released by offering themselves instead—for they must keep their promise to their father. Reuben stays behind with Benjamin in order to keep his promise to his father. When the other brothers inform Jacob of what has happened, Jacob does not believe them and becomes blind after crying much over the disappearance of his son. Forty years had passed since Joseph was taken from his father, and Jacob had held it in his heart. Jacob sends the brothers back to find out about Benjamin and Joseph. Upon their return Joseph reveals himself to his brothers and gives them one of his shirts to give to Jacob.