Revelation 20:1

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

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.

I saw
10:1 18:1

1:18 Revelation 9:1 Revelation 9:2 Luke 8:31

a great
2 Peter 2:4 ; Jude 1:6