When the earth is levelled by pounding (and) pounding [89:21] ?

When the earth is levelled by pounding (and) pounding [89:21] ? When it will be the Day of Judgement, Hell would be driven with seventy thousand reins by the hands of seventy thousand Angels. So it would move about with a movement, and had not Allah -azwj the Exalted Confined it, it would incinerate the skies and the…