Vayechi

Efraim and Menashe are the children of Golus, born in impure Mitzrayim, but not only display their commitment to derech avosam, but to supporting one another through thick and thin. It is then and there Yaakov perceives that his progeny would succeed in remaining loyal to his heritage in the exiles to come, and more importantly, he sees that they will remain loyal and devoted to each other, thus guaranteeing their ultimate survival.