Yahweh said to me, "Amos, what do you see?" I said, "A plumb line." Then the Lord said, "Behold, I will set a plumb line in the midst of my people Israel. I will not again pass by them any more.
then said the Lord, behold, I will set a plumbline in the midst of my people Israel; take an exact account of their actions, and see how they agree or disagree with the rule of the word; and in the most strict and righteous manner deal with them for their sins and transgressions, "lay judgment to the line, and righteousness to the plummet", Isaiah 28:17;