This phrase "for ever and ever" occurs twenty-one times in the book of Revelation; seventeen stress the uniquely eternal nature of God. Three times it refers to the never-ending punishment of the ungodly. Once, in its final occurrence, it refers to the never-ending blessedness of the redeemed. "The Lord God giveth them light: and they shall reign for ever and ever" (Revelation 22:5).

Source:

KJV Defenders Study Bible, by Dr. Henry Morris, Ph.D.
Publisher: Thomas Nelson
Language: English
DEF 10 ISBN 0-529-10444-x
DEF 10-1 ISBN 0-529-10445-8