And incidentally" they add: " When does that alleged promise – Hereafter

﴿وَيَقُولُونَ مَتَىٰ هَٰذَا ٱلۡوَعۡدُ إِن كُنتُمۡ صَٰدِقِينَ ﴾
[يسٓ: 48]

And incidentally" they add: " When does that alleged promise – Hereafter – fall due, if indeed you are declaring the truth

﴿ويقولون متى هذا الوعد إن كنتم صادقين﴾ [يسٓ: 48]

Dr Kamal Omar
And they will say: “When will this promise (about Resurrection be fulfilled,) if you are truthful?”

Dr Laleh Bakhtiar
And they say: When is this promise if you had been ones who are sincere

Dr Munir Munshey
And they say, "If you are truthful, tell us! When will that promise _ (the hereafter)_ be fulfilled

Edward Henry Palmer
They say, 'When shall this promise come to pass, if ye do tell the truth

Farook Malik
Further, they say: "When will this promise of resurrection come to pass, if what you say is true

George Sale
And they say, when will this promise of the resurrection be fulfilled, if ye speak truth

Maududi
They say: "When will this threat (of Resurrection) come to pass? Tell us if indeed you are truthful