Genesis 37:34-36

34Then Jacob tore his clothes, put sackcloth on his waist, and mourned for his son many days.

35And all his sons and all his daughters arose to comfort him; but he refused to be comforted, and he said, “For I shall go down into the grave to my son in mourning.” Thus his father wept for him.

36Now the Midianites had sold him in Egypt to Potiphar, an officer of Pharaoh and captain of the guard.