Reference for Bava Batra 237:1

לעולם בתי אבות קא חשיב והא קא משמע לן דבנות צלפחד נטלו חלק בכורה אלמא א"י מוחזקת היא

Fathers' houses are, in fact, enumerated. but<span class="x" onmousemove="('comment',' By enumerating also the daughters of Zelophehad. ');">¹</span> [Scripture] had taught us that the daughters of Zelophehad had [also] taken the portion of the birthright. Consequently,<span class="x" onmousemove="('comment',' Since they were given the double portion of the first-born. ');">²</span>

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