en_tn/num/34/13.md

to the nine tribes and to the half tribe

This means the remaining tribes of Israel who will live on the west side of the Jordan River in the land of Canaan. The tribes of Reuben and Gad and the half tribe of Manasseh had already received their land on the east side of the Jordan River.

following the assignment of property to their ancestor's tribe

"according to how Yahweh assigned the property to their ancestor's tribe"

The two tribes and the half tribe

"The tribes of Reuben and Gad, and half of the tribe of Manasseh"