Genesis 45:13
And ye shall tell my father of all my glory in Egypt, and of all that ye have seen; and ye shall haste and bring down my father hither. And ye shall tell my father of all my glory in Egypt, and of all that ye have seen; and ye shall haste and bring down my father hither.
The command follows earlier events in which the brothers had come to Egypt for food, had bowed before Joseph without recognizing him, and had told him that Benjamin remained with their father. It is given after Joseph has proved their true repentance, when they have confessed their wrongs and asked his forgiveness. At that moment he weeps openly and reveals himself as Joseph, and sees their astonishment, trouble and shame as their ill treatment of him, his despised dreams, and their repeated bowing to him pass before them.
They feel troubled amazement and self-condemnation as they remember envying him, intending murder, selling him as a slave, despising his dreams and laboring to prevent their fulfillment while repeatedly bowing to him in fulfillment of them. He seeks to make the occasion easy for them without censure because they have suffered enough, urging them not to grieve or be angry with themselves for selling him. For God rather than they sent him ahead to preserve life and posterity by a great deliverance, and made him a father to Pharaoh and lord and ruler over all his house and throughout Egypt. Their distress is relieved when they learn Joseph is alive and they are not guilty of his blood.
On that ground the verse directs the brothers to tell Jacob of all Joseph's glory, honor, high position and authority in Egypt and of all they have seen with their own eyes. They are to hasten and bring their father down to him without delay. The bringing is urgent because the famine is already two years long with five more years still to come of the seven-year famine without plowing or harvest. So Jacob with his children, grandchildren, flocks, herds and all he has is to dwell near Joseph in Goshen where Joseph will nourish and provide for him and his household lest they come to poverty. The account of Joseph wanting his father told of his position and circumstances and brought to Egypt without delay is suitable material for small books that teach Bible stories.