Revelation 20:1

Overview - Revelation 20
1	Satan bound for a thousand years.
6	The first resurrection; they blessed that have part therein.
7	Satan let loose again.
8	Gog and Magog.
10	The devils cast into the lake of fire and brimstone.
12	The last and general resurrection.

Revelation 20:1  (King James Version)
And I saw an angel come down from heaven, having the key of the bottomless pit and a great chain in his hand.