This the chapter where we first hear about the 144,000 of those set apart by God of His people. Plus much more..

~Scripture References~

- Seals on foreheads O/T Reference - Ezekiel 9

- More description of the 144,000 - Revelation 14: 1-5

- Other references to harps and songs - Revelation 5: 8-10 and 15: 2-4