What if one of Zelophehad's daughters were to marry a Jew? What if another marries an Asherite; a third one, a Benjamite; the fourth, a Gadite; and the fifth, a Simeonite? Who inherits the land when couple number one dies, or couple number two, or couple number three? The problem is that their offspring will not be of the same family and tribe as those in the area in which they are living; they would not be Manassites. They would be Jews, Asherites, Benjamites, Gadites, Simeonites, or whatever.
In other words, land that God gave to Manasseh would pass to the Jews, Asherites, etc., and the Manassites would not own their own land—all because a young person fell in love and married somebody out of his or her tribe.
John W. Ritenbaugh
The Covenants, Grace, and Law (Part Seventeen)