This is the thing which the LORD does command concerning the daughters of Zelophehad, saying,
Let them marry to whom they think best; only to the family of the tribe of their father shall they marry.
All Commentaries on Numbers 36:6 Go To Numbers 36
George Leo Haydock
AD 1849
Tribe. Hebrew adds family also: for heiresses were obliged to marry in their own family, to prevent the confusion of the inheritances. If they had a mind to renounce their right, they were at liberty to marry where they pleased. (Calmet)
The nearest relations, who chose to receive their land, were under an obligation of marrying them, Ruth iv. 6. (Haydock)
A similar law prevailed at Athens.