'Hills' in the Bible

Then the two men returned -- they came down from the hills, crossed the river, came to Joshua son of Nun, and reported to him all they had discovered.

And it came to pass, when all the kings which were on this side Jordan, in the hills, and in the valleys, and in all the coasts of the great sea over against Lebanon, the Hittite, and the Amorite, the Canaanite, the Perizzite, the Hivite, and the Jebusite, heard thereof;

So Joshua smote all the country of the hills, and of the south, and of the vale, and of the springs, and all their kings: he left none remaining, but utterly destroyed all that breathed, as the LORD God of Israel commanded.

and to the kings in the north, in the hill country, in the plain south of Chinnereth, in the Shephelah, and in the hills of Dor toward the west,

Only, all the cities that stood still upon their hills Israel did not burn, save Hazor alone, which Joshua burned.

So Joshua took all that land, the hills, and all the south country, and all the land of Goshen, and the valley, and the plain, and the mountain of Israel, and the valley of the same;

In Issachar and Asher, Manasseh had Beth-shean and its daughter-towns, and Ibleam and its daughter-towns, and the people of Dor and its daughter-towns, and the people of En-dor and its daughter-towns, and the people of Taanach and its daughter-towns, and the people of Megiddo and its daughter-towns, that is, the three hills.

According to the command of the Lord they gave him the city for which he asked—Timnath-serah in the hill country of Ephraim. So he built the city and settled in it.