'Watchman' in the Bible

This is what the Lord says to me,“Go, station the lookout, let him report what he sees.

And the lookout called like a lion,“O Lord, I stand continually on the watchtower by day,And I am stationed every night at my guard post.

“Now look! Here comes a troop of riders, horsemen in pairs.”And one said, “Fallen, fallen is Babylon;And all the carved images of her gods are shattered on the ground.”

The [mournful, inspired] oracle (a burden to be carried) concerning Dumah (Edom):Someone keeps calling to me from Seir (Edom),“Watchman, what is left of the night [of Assyrian oppression]?Watchman, what is left of the night? [How long until morning?]”

The watchman says,“The morning comes [only briefly], but also [comes] the night [of Babylonian oppression].If you would ask [of me then], ask [again, if Edom really wishes to know];Come back again.”