'Watchman' in the Bible

And the watchman on the tower in Jezreel saw Jehu and his band coming, and said, I see a band of people. And Joram said, Send out a horseman to them, and let him say, Is it peace?

So a horseman went out to them and said, The king says, Is it peace? And Jehu said, What have you to do with peace? come after me. And the watchman gave them word, saying, The horseman went up to them, but has not come back.

And the watchman gave them word, saying, He went up to them and has not come back again; and the driving is like the driving of Jehu, son of Nimshi, for he is driving violently.

He overcame the Philistines as far as Gaza and its limits, from the tower of the watchman to the walled town.