“The Holy City”
From the time of Moses and the building of the tabernacle through the time of David and the kings, it was the tabernacle or the later temple that was the holy place. But what is easily overlooked is that after the return from exile, things change. Peter Lau and Gregory Goswell explain:
It is plain from Nehemiah 2:20 what the wall [of Jerusalem] is intended to do, namely shut out all sources of uncleanness from the sacred place, the city. The entire city is now as holy as the temple, as the consecration of the first section of the wall by the priests makes clear (3:1). The appointment of (temple) gatekeepers, (cultic) singers and Levites to guard the city gates (7:1-3) shows the sacral character of the city, and situating the assembly “in the square before the Water Gate” does the same (8:1). The city is designated “the holy city” (11:1, 18) and at the dedication the priest “purified the people and the gates and the wall” (12:30). Lastly, in 13:22 it is the Levites who guard the city gates, which again bespeaks the expansion of the sanctity from the temple to the city as a whole (Peter H. W. Lau & Gregory Goswell, Unceasing Kindness: A Biblical Theology of Ruth, 15).