Parashas Masei · Passuk 36:8 · TT note 1
Chabad.org — English translation + Rashi
Torah Temimah points to Bava Basra 111a (TT note on “וְכָל בַּת יֹרֶשֶׁת”).
E-Daf — Bava Basra 111a · Sefaria
English: Our Rabbis taught: “And every daughter who inherits a possession from the tribes of the children of Israel” — how can a daughter inherit two tribes? Rather, this is one whose father is of one tribe and whose mother is of another, and his daughter inherits them both. From here [we learn] that a daughter inherits her mother, and all the more so a son.
Daughter inherits from mother; a fortiori a son inherits from mother.
Maternal inheritance is transmitted to a daughter (and therefore also to a son), allowing an heiress of mixed tribal parentage to inherit both lines.