Числа 36:10

In Num 36:10-12 it is related that, in accordance with these instructions, the five daughters of Zelophehad, whose names are repeated from Num 26:33 and Num 27:1 (see also Jos 17:3), married husbands from the families of the Manassites, namely, sons of their cousins (? uncles), and thus their inheritance remained in their father's tribe (על היה, to be and remain upon anything).

36:10-12 As they had been instructed, Zelophehad’s five daughters all married cousins on their father’s side, keeping their father’s allotment within his clan. Marriage to a first cousin was acceptable in ancient Hebrew society (cp. Lev 18, 20; see also 1 Chr 23:22) as well as in other Near Eastern cultures.