Joshua 18:4-6

4Provide three men from each tribe, and I will send them out that they may set out and go up and down the land. They shall write a description of it with a view to their inheritances, and then come to me.

5They shall divide it into seven portions. Judah shall continue in his territory on the south, and the house of Joseph shall continue in their territory on the north.

6And you shall describe the land in seven divisions and bring the description here to me. And I will cast lots for you here before the Lord our God.