The Blessing of Ephraim and Menashe

With you shall Israel bless...May G-d make you as Ephraim and Menashe (48:20)

In the previous verses Jacob had said, “Ephraim and Menashe shall be to me as Reuven and Shimon.” Despite the fact that Ephraim and Menashe were born in exile and were educated in Egypt, a land not conducive to Torah learning and Judaism, they were still as righteous and pure as Reuven and Shimon, who grew up in more enclosed and insular surroundings in Jacob’s household.
(Lubavitcher Rebbe)