Matthew Poole and continuators on Numbers 36:5

5 And Moses commanded the children of Israel according to the word of the LORD, saying, The tribe of the sons of Joseph hath said well .

Their plea is just and reasonable. God did not take particular care about every occurrence that happened or might happen, but left divers things to be found out by humane prudence, which being his own gift it was meet there should be opportunities left for the exercise of it, and God thought fit to approve and ratifie the prudent and profitable inventions of men by his own law or sanction, as in the case of Iethro, Exod 18. of Zelophehads Daughters, Num. 27. and here of their brethren. But it is observable, that God allowed this onely in civil affairs, but never in the matters of his worship, where he utterly forbids it.