Charles Ellicott Commentary Joshua 18:3

"And Joshua said unto the children of Israel, How long are ye slack to go in to possess the land, which Jehovah, the God of your fathers, hath given you?" — Joshua 18:3 (ASV)

And Joshua said ... —Joshua, who took no inheritance for himself until all the tribes had received their portions, was free from the selfishness of the other leaders. He could not rest until he had finished the work that was given him to do. He therefore ordered that the rest of the territory should be surveyed, and divided, according to the number of the cities, into seven portions, which were then to be allotted according to the instructions given by Moses.