'Slopes' in the Bible

with all the Arabah (desert lowlands) across the Jordan to the east, even as far as the sea of the Arabah (the Dead Sea), at the foot of the slopes of Pisgah.

So Joshua struck all the land, the hill country, the Negev (South country) and the lowland and the slopes [that descend to the Dead Sea] and all their kings. He left no survivor, but he utterly destroyed all who breathed, just as the Lord, the God of Israel, had commanded.

and the Arabah [plain] as far as the Sea of Chinnereth (Galilee) eastward, and as far as the sea of the Arabah, the Salt (Dead) Sea, eastward toward Beth-jeshimoth, and southward to the foot of the slopes of [Mount] Pisgah;

in the hill country, in the lowland (foothills), in the Arabah [plain], on the slopes [descending to the Dead Sea], and in the wilderness, and in the Negev (South country)—the [lands of the] Hittite, the Amorite and the Canaanite, the Perizzite, the Hivite and the Jebusite:

and Beth-peor and the slopes of Pisgah and Beth-jeshimoth,