Zechariah 2:3

I lifted up mine eyes again, and looked, and behold a man with a measuring line in his hand.

Then said I, Whither goest thou? And he said unto me, To measure Jerusalem, to see what is the breadth thereof, and what is the length thereof.

And said unto him, Run, speak to this young man, saying, Jerusalem shall be inhabited as towns without walls for the multitude of men and cattle therein:

For I, saith the LORD, will be unto her a wall of fire round about, and will be the glory in the midst of her.