Background
What is Gittith? Korah together 250 Israelites were killed by God because of their uproar against Moses (Number 16:32). However Sons of Korah did not die (Number 26:11).
Exposition
v1: God’s dwelling places: the tabernacle, the template, and in NT, the Church of Jesus Christ. Lord of hosts: Jehovah Sabaoth, first appears in 1 Sam 1:3, however Joshua 5:13 has a preview of the name, in different form.