Joshua 18:2-4

Young's Literal Translation

² And there are left among the sons of Israel who have not shared their inheritance, seven tribes,

³ and Joshua saith unto the sons of Israel, `Till when are ye remiss to go in to possess the land which He hath given to you, Jehovah, God of your fathers?

⁴ Give for you three men for a tribe, and I send them, and they rise and go up and down through the land, and describe it according to their inheritance, and come in unto me,