Zechariah 2:2-5

So I said, “Where are you going?” And he said to me, “To measure Jerusalem, to see how wide it is and how long it is.” And behold, the angel who was speaking with me was going out, and another angel was coming out to meet him, and said to him, “Run, speak to that young man, saying, ‘Jerusalem will be inhabited without walls because of the multitude of men and cattle within it. For I,’ declares the LORD, ‘will be a wall of fire around her, and I will be the glory in her midst.’ ”