Revelation 20:1-3 New Living Translation (NLT)
The Thousand Years
20 Then I saw an angel coming down from heaven with the key to the bottomless pit and a heavy chain in his hand. 2 He seized the dragon—that old serpent, who is the devil, Satan—and bound him in chains for a thousand years. 3 The angel threw him into the bottomless pit, which he then shut and locked so Satan could not deceive the nations anymore until the thousand years were finished. Afterward he must be released for a little while.
Satans punishment- The Thousand years
An Angel was sent down from heaven to the punishment of Satan, he locked Satan up in chains and put him in the bottomless pit. There he would be held for 1,000 years unable to trick the nations anymore. However when 1,000 is up he must be released again for a little while.