﴿ قُلْ يَٰٓأَهْلَ ٱلْكِتَٰبِ لِمَ تَكْفُرُونَ بِـَٔايَٰتِ ٱللَّهِ وَٱللَّهُ شَهِيدٌ عَلَىٰ مَا تَعْمَلُونَ ﴾

“SAY: "O followers of earlier revelation! Why do you refuse to acknowledge the truth of God's messages, when God is witness to all that you do?"”

Please check ayah 3:99 for complete tafsir.