Watchmen

Jeremiah 6:17, This is what the Lord says, "I appointed watchmen over you and said, 'Listen to the sound of the trumpet!' But you said, 'We will not listen.'

The Lord spoke these words to the prophet Jeremiah and he delivered them to Judah (the southern kingdom of Israel) right before the people were overrun by the Babylonians and hauled away to be slaves in Babylon.