Casiphia was a site in Babylonia where Ezra sent messengers to recruit Levites and temple servants for the return to Jerusalem (Ezra 8:17). The location housed a community led by Iddo, with access to temple personnel. Its exact identification remains uncertain, though the name may derive from a word meaning 'silver' (the LXX translates it that way). The double mention in verse 17 emphasizes both the place and the mission, showing Ezra's determination to secure proper liturgical personnel for temple service, not just lay returnees.