Aal-'Imran - 3:70

يَا أَهْلَ الْكِتَابِ لِمَ تَكْفُرُونَ بِآيَاتِ اللّهِ وَأَنتُمْ تَشْهَدُونَ
[3:70]
O followers of the Book! Why do you disbelieve in the communications of Allah while you witness (them)?
Ye People of the Book! Why reject ye the Signs of Allah, of which ye are (Yourselves) witnesses?
O People of the Scripture! Why disbelieve ye in the revelations of Allah, when ye (yourselves) bear witness (to their truth)?