10:48
وَيَقُولُونَ مَتَىٰ هَـٰذَا ٱلْوَعْدُ إِن كُنتُمْ صَـٰدِقِينَ
wayaqūlūna matā hādhā l-waʿdu in kuntum ṣādiqīna
And they say, "When is [the fulfillment of] this promise, if you should be truthful?"
— Saheeh International
They ask, ‘When will this promise be fulfilled, if what you say is true?’
— M. A. S. Abdel Haleem
And they say: "When will be this promise (the torment or the Day of Resurrection), if you speak the truth?"
— Muhammad Muhsin Khan & Muhammad Taqi-ud-Din al-Hilali