מִֽמִּשְׁפְּחֹ֛ת בְּנֵֽי־מְנַשֶּׁ֥ה בֶן־יוֹסֵ֖ף הָי֣וּ לְנָשִׁ֑ים וַתְּהִי֙ נַחֲלָתָ֔ן עַל־מַטֵּ֖ה מִשְׁפַּ֥חַת אֲבִיהֶֽן׃
They were married into the families of the sons of Manasseh the son of Joseph, and their inheritance remained in the tribe of the family of their father.
Read midrashic interpretation of Numbers 36:12: and classical rabbinic exegesis.