Bible Verses About Watchmen: On watch towers

Now the watchman was standing on the tower in Jezreel, and he spied the company of Jehu as he came, and said, I see a company. And Joram said, Take a horseman, and send to meet them, and let him say, Is it peace?

They prepare the table, they set the watch, they eat, they drink: rise up, ye princes, anoint the shield.