Revelation 20:4

"And I saw thrones, and they sat on them, and judgment was committed to them. Then I saw the souls of those who had been beheaded for their witness to Jesus and for the word of God, who had not worshiped the beast or his image, and had not received his mark on their foreheads or on their hands. And they lived and reigned with Christ for a thousand years."

(This is the thousand-year reign as stated. It is certainly not the end of the eternity promised to those who stay faithful to Christ. These are those people in this passage.)