Yusuf • BN-TAFSEER-IBN-E-KASEER
﴿ قَالُوا۟ فَمَا جَزَٰٓؤُهُۥٓ إِن كُنتُمْ كَٰذِبِينَ ﴾
“[The Egyptians] said: "But what shall be the requital of this [deed] if you are [proved to be] liars?"”
Please check ayah 12:76 for complete tafsir.