תּוֹרָה קנ

The image of his father's form he saw [Sotah 36b, Tanchuma, Vayeshev] — how the image appeared is a very hidden matter. For certainly Yaakov did not know of this — for he thought Yosef had been utterly torn. And the greatness of the trial even though he saw the image of his father's form — these are matters hidden and concealed from people.