'Line' in the Bible

So in the half light they got up to go to the tents of Aram; but when they came to the outer line of tents, there was no one there.

And when those lepers came to the outer line of tents, they went into one tent, and had food and drink, and took from it silver and gold and clothing, which they put in a secret place; then they came back and went into another tent from which they took more goods, which they put away in a secret place.

And over Jerusalem will be stretched the line of Samaria and the weight of Ahab; Jerusalem will be washed clean as a plate is washed, and turned over on its face.