Bible Verses About Watchmen: Sounded an alarm at the approach of enemies

`Son of man, speak unto the sons of thy people, and thou hast said unto them: A land--when I bring in against it a sword, And the people of the land have taken one man out of their borders, And made him to them for a watchman.

And he hath seen the sword coming against the land, And hath blown with a trumpet, and hath warned the people,