Saba, 29 Ayah
34:29
وَيَقُولُونَ مَتَىٰ هَٰذَا ٱلۡوَعۡدُ إِن كُنتُمۡ صَٰدِقِينَ ٢٩
Wa Yaqūlūna Matá Hādhā Al-Wa`du 'In Kuntum Şādiqīna
And they say, "When is this promise, if you should be truthful?"