Exodus 1:5 Commentary: Rashi, Or HaChaim, Siftei Chakhamim & Rav Hirsch

ויוסף היה במצרים lit., AND JOSEPH WAS IN EGYPT — But were not he and his sons included in the seventy? What, then, is this statement intended to tell us? Do we not know that he was in Egypt? But its purpose is to inform you of Joseph’s righteousness: this is the same Joseph who tended his father’s sheep; this is the same Joseph who was in Egypt and became king there, and yet he remained steadfast in his righteousness, and the change from a humble position to exalted rank in Egypt caused no deterioration in his character (cf. Sifrei האזינו; Exodus Rabbah 1:7).

ויהי כל נפש…ויוסף היה במצרים. And the total number of persons…plus Joseph who was in Egypt already." Why does the Torah introduce this paragraph with the word ויהי which always introduces a painful experience? If the Torah refers to the exile, this was not the place to mention this seeing that the negative aspects of the exile did not commence till over 90 years later. Furthermore, why does the Torah have to tell us again that Joseph was already in Egypt?

But, were not he and his sons included in the seventy? And if so, Yoseif’s name should have been included with those of seventy. In other words, it should have come before the sum total of Yaakov’s descendants.