'Plumbline' in the Bible

But pelican and hedgehog will possess it,And owl and raven will dwell in it;And He will stretch over it the line of desolationAnd the plumb line of emptiness.

Thus He showed me, and behold, the Lord was standing by a vertical wall with a plumb line in His hand.

The Lord said to me, “What do you see, Amos?” And I said, “A plumb line.” Then the Lord said,“Behold I am about to put a plumb lineIn the midst of My people Israel.I will spare them no longer.

For who has despised the day of small things? But these seven will be glad when they see the plumb line in the hand of Zerubbabel—these are the eyes of the Lord which range to and fro throughout the earth.”