I had a conversation with someone awhile back and we were discussing homosexuality. My position was that the Bible never changes and this person disagreed. They used the daughters of Zelophehad as an example of the law being changed by Moses once established so the law is not set into stone or unchangeable.
Then drew near the daughters of Zelophehad the son of Hepher, son of Gilead, son of Machir, son of Manasseh, from the clans of Manasseh the son of Joseph. The names of his daughters were: Mahlah, Noah, Hoglah, Milcah, and Tirzah. And they stood before Moses and before Eleazar the priest and before the chiefs and all the congregation, at the entrance of the tent of meeting, saying, “Our father died in the wilderness. He was not among the company of those who gathered themselves together against the LORD in the company of Korah, but died for his own sin. And he had no sons. Why should the name of our father be taken away from his clan because he had no son? Give to us a possession among our father’s brothers.” Moses brought their case before the LORD. And the LORD said to Moses, “The daughters of Zelophehad are right. You shall give them possession of an inheritance among their father’s brothers and transfer the inheritance of their father to them. And you shall speak to the people of Israel, saying, ‘If a man dies and has no son, then you shall transfer his inheritance to his daughter. And if he has no daughter, then you shall give his inheritance to his brothers. And if he has no brothers, then you shall give his inheritance to his father’s brothers. And if his father has no brothers, then you shall give his inheritance to the nearest kinsman of his clan, and he shall possess it. And it shall be for the people of Israel a statute and rule, as the LORD commanded Moses.'”
In chapter 26, Moses has taken a census of the people who were to enter into the promised land. The census was to be used to determine how to split of the land between the various tribes equally, based on the number of men in those tribes. Since Zelophehad had no sons, according to the rules of the census, that family would not have inherited any of the promised land. There are no Levitcal laws being addressed her, so that part of their argument is incorrect.
Since the rules for inheritance are being further defined here, I can see why they claimed that the Bible’s stance, which would be God’s stance, changes based on various conditions. The daughters were not married, so they would have had no way to provide for themselves once they entered into the Promised Land. That was never the intent of the inheritance rules and Levitcal law has provisions for taking care of unmarried women, usually widows, but would also apply in this case so there is no conflict with the law. In the case of no sons, the daughters had claim to their father’s portion. If the girls would have married, their portion of land would have basically transferred to their husband. If the women would have died without an heir, the male member’s of her family would have the right to purchase and redeem the land and keep it in the family. You see this in practice in Esther.
I still don’t think the Bible changes, at least not based on this example.