Revelation 5:11

5:11 Then I looked and heard the voice of many angels in a circle around the throne, as well as the living creatures and the elders. Their number was ten thousand times ten thousand – thousands times thousands –

Revelation 13:17

13:17 Thus no one was allowed to buy or sell things unless he bore the mark of the beast – that is, his name or his number.

Revelation 20:8

20:8 and will go out to deceive the nations at the four corners of the earth, Gog and Magog, to bring them together for the battle. They are as numerous as the grains of sand in the sea.