'Thousand' in the Bible

Belshazzar the king [who was a descendant of Nebuchadnezzar] gave a great feast for a thousand of his nobles, and he was drinking his wine in the presence of the thousand [guests].

“A river of fire was flowingAnd coming out from before Him;A thousand thousands were attending Him,And ten thousand times ten thousand were standing before Him;The court was seated,And the books were opened.