﴿ كَلَّآ إِذَا دُكَّتِ ٱلْأَرْضُ دَكًّۭا دَكًّۭا ﴾

“Nay, but [how will you fare on Judgment Day,] when the earth is crushed with crushing upon crushing,”

Nay) this is also a reply to them, (but when the earth is ground to atoms, grinding, grinding) He says: when the earth is quaked again and again,