Ezekiel

Except the Lord build the house, they labour in vain that build it: except the Lord keep the city, the watchman waketh but in vain.

For thus hath the Lord said unto me, Go, set a watchman, let him declare what he seeth.

Also, thou son of man, the children of thy people still are talking against thee by the walls and in the doors of the houses, and speak one to another, every one to his brother, saying, Come, I pray you, and hear what is the word that cometh forth from the Lord.

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,

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.