Numbers 36:5

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 human 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 ratify the prudent and profitable inventions of men by his own law or sanction; as in the case of Jethro, Exo 18, of Zelophehad's daughter, Num 27, and here of their brethren. But it is observable, that God allowed this only in civil affairs, but never in the matters of his worship, where he utterly forbids it.