'Line' in the Bible

So this is what the Lord has said: I have come back to Jerusalem with mercies; my house is to be put up in her, says the Lord of armies, and a line is to be stretched out over Jerusalem.

And lifting up my eyes, I saw a man with a measuring-line in his hand.

For who has had a poor opinion of the day of small things? for they will be glad when they see the weighted measuring-line in the hand of Zerubbabel. Then he said in answer to me, These seven lights are the eyes of the Lord which go quickly up and down through all the earth.