قَالُوا۟ فَمَا جَزَٰٓؤُهُۥٓ إِن كُنتُمْ كَـٰذِبِينَ
Q a loo fam a jaz a ohu in kuntum k ath ibeen a [The Egyptians] said: "But what shall be the requital of this [deed] if you are [proved to be] liars?"
 - Mohammad Asad
The royal servants said: "What should be the punishment of the thief, if you are liars?"
 - Muhammad Farooq-i-Azam Malik
Joseph's men asked, 'What should be the price for theft, if you are lying?'
 - Mustafa Khattab
They said : And what shall be the penalty for it if ye prove liars?
 - Marmaduke Pickthall
(The Egyptians) said: "What then shall be the penalty of this if ye are (proved) to have lied?" 1739
 - Abdullah Yusuf Ali