Yusuf - 12:74

قَالُواْ فَمَا جَزَآؤُهُ إِن كُنتُمْ كَاذِبِينَ
[12:74]
They said: But what shall be the requital of this, if you are liars?
(The Egyptians) said: "What then shall be the penalty of this, if ye are (proved) to have lied?"
They said: And what shall be the penalty for it, if ye prove liars?