Bible Verses About Watchmen: On watch towers

The watchman therefore, that stood upon the tower of Jezrahel, saw the troop of Jehu coming, and said: I see a troop. And Joram said: Take a chariot, and send to meet them, and let him that goeth say: Is all well?

Prepare the table, behold in the watchtower them that eat and drink: arise, ye princes, take up the shield.