'Whose' in the Bible

Now these are the kings of the land whom the sons of Israel defeated, and whose land they possessed beyond the Jordan toward the east, from the valley of the [river] Arnon to Mount Hermon, and all the Arabah [plain] to the east:

If it is unacceptable in your sight to serve the Lord, choose for yourselves this day whom you will serve: whether the gods which your fathers served that were on the other side of the River, or the gods of the Amorites in whose land you live; but as for me and my house, we will serve the Lord.”