Amos 7:7-8

This is what he showed me: the Lord was standing by a wall that had been built true to plumb, with a plumb-line in his hand. And the LORD asked me, ‘What do you see, Amos?’ ‘A plumb-line,’ I replied. Then the Lord said, ‘Look, I am setting a plumb-line among my people Israel; I will spare them no longer.