Joshua 18:18

And the whole congregation of the children of Israel assembled together at Shiloh, and set up the tabernacle of the congregation there. And the land was subdued before them.

And there remained among the children of Israel seven tribes, which had not yet received their inheritance.

And Joshua said unto the children of Israel, How long are ye slack to go to possess the land, which the LORD God of your fathers hath given you?

Give out from among you three men for each tribe: and I will send them, and they shall rise, and go through the land, and describe it according to the inheritance of them; and they shall come again to me.