'Line' in the Bible

From there they went on and put up their tents on the other side of the Arnon, which is on the waste land at the edge of the land of the Amorites; for the Arnon is the line of division between Moab and the Amorites:

And your limit on the north will be the line from the Great Sea to Mount Hor:

And from Mount Hor the line will go in the direction of Hamath; the farthest point of it will be at Zedad: