Isaiah 21:6
For thus hath the Lord said unto me, Go, set a watchman, let him declare what he seeth.
2 Kings 9:17-20
And there stood a watchman 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 an horseman, and send to meet them, and let him say, Is it peace?
Isaiah 62:6
I have set watchmen upon thy walls, O Jerusalem, which shall never hold their peace day nor night: ye that make mention of the LORD, keep not silence,
Jeremiah 51:12-13
Set up the standard upon the walls of Babylon, make the watch strong, set up the watchmen, prepare the ambushes: for the LORD hath both devised and done that which he spake against the inhabitants of Babylon.
Ezekiel 3:17
Son of man, I have made thee a watchman unto the house of Israel: therefore hear the word at my mouth, and give them warning from me.
Ezekiel 33:2-7
Son of man, speak to the children of thy people, and say unto them, When I bring the sword upon a land, if the people of the land take a man of their coasts, and set him for their watchman:
Habakkuk 2:1-2
I will stand upon my watch, and set me upon the tower, and will watch to see what he will say unto me, and what I shall answer when I am reproved.