Dalil
العربية

Quran Yusuf 12:74

قَالُواْ فَمَا جَزَٰٓؤُهُۥٓ إِن كُنتُمۡ كَٰذِبِينَ

Translation

They [the accusers] said, "Then what would be its recompense if you should be liars?"