Zechariah 2:2
1 I looked again, and there was a man with a measuring line in his hand. 2 I asked, “Where are you going?” He replied, “To measure Jerusalem in order to determine its width and its length.” 3 At this point the angelic messenger who spoke to me went out, and another messenger came to meet him 4 and said to him, “Hurry, speak to this young man as follows: ‘Jerusalem will no longer be enclosed by walls because of the multitude of people and animals there. 5 But I,’ the Lord says, ‘will be a wall of fire surrounding Jerusalem and the source of glory in her midst.’”
1 Enoch 61:2
1 And I saw in those days how long cords were given to those angels, and they took to themselves wings and flew, heading north. 2 I asked the angel, 'Why have those angels taken these cords and departed?' And he replied, 'They have gone to measure.' 3 The angel who accompanied me said, 'These shall bring the measures of the righteous, and the ropes of the righteous to the righteous, that they may rely on the name of the Lord of Spirits forever and ever.' 4 The chosen will begin to dwell with the chosen, and these are the measures which shall be given to faith and which shall strengthen righteousness.
Notes and References
"... The city will be rebuilt after having been destroyed by enemies, and there is the promise of ‘holiness’ after a time of enormous defilement because of the proliferation of corpses. The perimeters of Jerusalem will be determined with a measuring line, thus indicating where the new walls will be built. For a similar act, see Ezekiel 40:3, 5; 42:16, 19; Zechariah 2:1–2. The tower of Hananel is situated on the north-east side of the city and is also mentioned in Nehemiah 3:1; 12:39; and Zechariah 14:10. The Corner Gate is probably north-west of the city (see 2 Kings 14:13; 2 Chronicles 26:9; Zechariah 14:10). Gareb and Goa are unknown. The valley is most probably the Valley of Ben Hinnom (see 2 Kings 23:10–14 where the Kidron Valley is also mentioned; see also Jeremiah 7:31–32; 19). The whole area that was so defiled will be holy to the LORD, which is an enormous contrast with the past (compare Zechariah 14:10–11, 20–21) ..."
Lalleman-de Winkel, H. Jeremiah and Lamentations (p. 232) InterVarsity Press, 2013