Genesis 37:35
And all his sons and all his daughters rose up to comfort him; but he refused to be comforted; and he said, For I will go down into the grave unto my son mourning. Thus his father wept for him. And all his sons and all his daughters rose up to comfort him; but he refused to be comforted; and he said, For I will go down into the grave unto my son mourning. Thus his father wept for him.
Jacob loved Joseph more than his other children, and his heart was bound up in him. His sons showed him Joseph's bloodied coat. Through them he was led to believe that wild beasts had killed Joseph. Though all his sons and daughters rose up to comfort him, his grief was so deep that he refused to be comforted and expected to go down to the grave still mourning for his son.
Jacob mourned Joseph as dead until he saw him alive again, and then expressed his willingness to die. When they met again Joseph left his chariot, ran to meet his father on foot, embraced him, and they wept over each other. This mourning belongs to the account of Joseph's unjust suffering as one maligned, persecuted and treated as a criminal, yet God gave him signal victories even while he appeared to suffer for doing right.
Mourning like Jacob's should not be nourished until health is harmed. The mind should turn from dwelling on the affliction to gratitude for God's mercy in preparing the loved one for heaven.