"Now, my children, love ye the Lord, the God of heaven and earth, and observe His commandments, taking that good and pious man Joseph as your model. Until the day of his death he would not have divulged what his brethren had done to him, and although God revealed their action to Jacob, he continued to deny it. Only after many efforts, when Jacob adjured him to confess the truth, he was induced to speak out. Even then he besought our father Jacob to pray for our brethren, that God account not the evil they had done to him as a sin. And Jacob exclaimed, 'O my good child Joseph, thou hast shown thyself more merciful than I was!'
Jacob — Kingdom of Joseph
Legends of the Jews 2:83