Biblical References
The Tanakh reference to Har Tzion (Mount Tzion) that identifies its location is derived from the Psalm 48 composed by the sons of Korah, i.e. Levites, as "the northern side of the city of the great king", which Radak interprets as the City of David "from the City of David, which is Zion (1 Kings 8:1-2; 2 Chron. 5:2)". 2 Samuel 5:7 also reads, "David took the strong hold of Zion: the same is the city of David," which identifies Mount Tzion as part of the City of David, and not an area outside today's Old City of Jerusalem. Rashi identifies the location as the source of "joy" mentioned in the Psalm as the Temple Courtyard, the location of atonement offerings in the northern part of the Temple complex.
Read more about this topic: Mount Zion