'Watchman' in the Bible

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

So a horseman went to meet him and said, “Thus says the king, ‘Is it peace?’” And Jehu said, “What have you to do with peace? Turn behind me.” And the watchman reported, “The messenger came to them, but he did not return.”

The watchman reported, “He came even to them, and he did not return; and the driving is like the driving of Jehu the son of Nimshi, for he drives furiously.”