Bible Verses About Towers: Watchmen posted on, in times of danger

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.” Joram said, “Take a horseman, and send to meet them, and let him say, ‘Is it peace?’”

I will stand at my watch, and set myself on the ramparts, and will look out to see what he will say to me, and what I will answer concerning my complaint.