Surah Saba, ayah 29

34:29

وَيَقُولُونَ مَتَىٰ هَٰذَا ٱلۡوَعۡدُ إِن كُنتُمۡ صَٰدِقِينَ ٢٩

Wayaqūlūna matā hādhal-wa'du in kuntum sādiqīn

And they say, "When is this promise, if you should be truthful?"