21:38
وَيَقُولُونَ مَتَىٰ هَـٰذَا ٱلْوَعْدُ إِن كُنتُمْ صَـٰدِقِينَ
wayaqūlūna matā hādhā l-waʿdu in kuntum ṣādiqīna
And they say, "When is this promise, if you should be truthful?"
— Saheeh International
They say, ‘When will this promise be fulfilled, if what you say is true?’
— M. A. S. Abdel Haleem
And they say: "When will this promise (come to pass), if you are truthful."
— Muhammad Muhsin Khan & Muhammad Taqi-ud-Din al-Hilali