And Moshe brought their case before Hashem.
Torah Temimah: Bava Basra 119b
English: It was taught: the daughters of Tzelofchad were wise women, for they spoke according to the moment. R. Shmuel b. R. Yitzchak said: this teaches that Moshe was sitting and expounding the section of yibbum. They said to him: if we are reckoned as a son, give us an inheritance like a son; and if not, let our mother undergo yibbum. Immediately Moshe brought their case before Hashem.
Timely legal challenge during a related derashah.
Their timing forced the open question of female inheritance into Moshe’s hands.