﴿ 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) i.e. the disbelievers of Mecca: (When will this promise) that you have promised us, O Muhammad, ((be fulfilled), if ye are truthful?)