Yusuf Ali
They say: "When will this promise (come to pass) if ye are telling the truth?"

Sahih International
And they say, "When is this promise, if you should be truthful?"

Shakir
And they say: When will this promise be (fulfilled) if you are truthful?

Pickthall
And they say: When is this promise (to be fulfilled) if ye are truthful?

محمد جالندھری
اور کہتے ہیں اگر تم سچ کہتے ہو تو یہ (قیامت کا) وعدہ کب وقوع میں آئے گا