'Cords' in the Bible

When he defeated Moab, he measured them with the cord, making them lie on the ground. He measured two cords to kill and {the third cord} to let live. So Moab became servants of David, bringing tribute.

And if he has gone into some town, then let all Israel take strong cords to that town, and we will have it pulled into the valley, till not one small stone is to be seen there.

The cords of Sheol have surrounded me, Before me have been the snares of death.