﴿ وَيَقُولُونَ مَتَىٰ هَٰذَا ٱلْوَعْدُ إِن كُنتُمْ صَٰدِقِينَ ﴾

“But they [who reject My messages are wont to] ask, “When is that promise [of God’s judgment] to be fulfilled? [Answer this, O you who believe in it,] if you are men of truth!””

And they say ‘When will this promise of resurrection be fulfilled if you are truthful?’ about it.