Rev 15:2, 17:9, 21:17 | ISV | STEP | The Vision of the Sea of Glass Then I saw what looked like a sea of glass mixed with fire. Those who had conquered the beast, its image, and the number of its name were standing on the sea of glass holding God's harps in their hands.

Revelation of John 15:2

2 The Vision of the Sea of GlassThen I saw what looked like a sea of glass mixed with fire. Those who had conquered the beast, its image, and the number of its name were standing on the sea of glass holding God's harps in their hands.Matt 3:11; Rev 4:6; 5:8; 13:15-17; 14:2; 21:18

Revelation of John 17:9

9 This calls for a mind that has wisdom. The seven heads are seven mountains on which the woman is sitting. They are also seven kings.Rev 13:1, 18

Revelation of John 21:17

17 He also measured its wall. According to the human measurement that the angel was using it was 144 cubits. ^{▼▼One cubit is equivalent to 21 inches.}