'Low country' in the Bible

And it cometh to pass, when all the kings who are beyond the Jordan, in the hill-country, and in the low-country, and in every haven of the great sea, over-against Lebanon, the Hittite, and the Amorite, the Canaanite, the Perizzite, the Hivite, and the Jebusite, hear --

And Joshua smiteth all the land of the hill-country, and of the south, and of the low-country, and of the springs, and all their kings -- he hath not left a remnant, and all that doth breathe he hath devoted, as Jehovah, God of Israel, commanded.