Comentario sobre Números 36:11

מחלה תרצה וגו׳ MAHLA, TIRZA etc., — Here it enumerates them according to their superiority over one another in years for they were married in the order in which they were born. But everywhere else in the Bible it enumerates them according to their intelligence: This tells us that they were all equal (cf. Bava Batra 120a; Rashi on Numbers 27:1).

מחלה, תרצה, “Machlah, Tirtzah;” earlier the Torah mentioned the names of these girls in the chronological order of their births, whereas here the Torah mentions them in the order of their getting married. When the Torah describes their husbands as “sons of their uncles,” this does not mean that the husbands were all brothers of one another (Ibn Ezra).

And they were married. Rashi is answering the question: In Parshas Pinchas (27:1) Scripture mentioned Sirtzah at the end, while here she is mentioned second. He answers that here they are listed in the order of seniority [i.e., age], meaning that here it is written, “They were…wives to their cousins” and it is customary for sisters to marry in order of their birth, first the oldest and afterward the younger ones in order of their age, as it is written [referring to marrying the younger daughter before the older] (Bereishis 29:26), “Such is not done in our place…”