The Saheeh International Quran Translation
وَيَقُولُونَ مَتَىٰ هَٰذَا ٱلْوَعْدُ إِن كُنتُمْ صَٰدِقِينَ
تجهيز للطباعة
And they say, "When is this promise, if you should be truthful?"