Chasidut על בראשית 46:27

On the other hand, the Jewish nation’s weltanschauung is pure monotheism. We see the One everywhere. As a result, the seventy members of Jacob’s family are referred to in the Torah as ha-nefesh le- bais le-Yaakov, “the soul to the house of Jacob” (Gen. 46:27). Seventy different bodies were all parts of one soul.²⁸⁰Rashi ibid. See further Da’as Tefillah pg. 155.