Zechariah 2:2-5

So I said, “Where are you going?” And he said to me, “To measure Jerusalem, to see what is its width and what is its length.” And there was the angel who talked with me, going out; and another angel was coming out to meet him, who said to him, “Run, speak to this young man, saying: ‘Jerusalem shall be inhabited as towns without walls, because of the multitude of men and livestock in it. For I,’ says the LORD, ‘will be a wall of fire all around her, and I will be the glory in her midst.’ ”