Back 
Surah 3. Aal-Imran
Ayah 98 - 99
98 قُلْ يَـٰٓأَهْلَ ٱلْكِتَـٰبِ لِمَ تَكْفُرُونَ بِـَٔايَـٰتِ ٱللَّهِ وَٱللَّهُ شَهِيدٌ عَلَىٰ مَا تَعْمَلُونَ
99 قُلْ يَـٰٓأَهْلَ ٱلْكِتَـٰبِ لِمَ تَصُدُّونَ عَن سَبِيلِ ٱللَّهِ مَنْ ءَامَنَ تَبْغُونَهَا عِوَجًا وَأَنتُمْ شُهَدَآءُ ۗ وَمَا ٱللَّهُ بِغَـٰفِلٍ عَمَّا تَعْمَلُونَ
98. Say: "O People of the Scripture (Jews and Christians)! Why do you reject the Ayat of Allah, while Allah is Witness to what you do'' 99. Say: "O People of the Scripture (Jews and Christians)! Why do you stop those who have believed, from the path of Allah, seeking to make it seem crooked, while you (yourselves) are witnesses And Allah is not unaware of what you do.''
In this Ayah Allah criticizes the disbelieving People of the Book for refusing the truth, rejecting Allah's Ayat and hindering those who seek to believe from His path, although they know that what the Messenger was sent with is the truth from Allah. They learned this from the previous Prophets and honorable Messengers, may Allah's peace and blessings be on them all. They all brought the glad tidings and the good news of the coming of the unlettered, Arab, Hashimi Prophet from Makkah, the master of the Children of Adam, the Final Prophet and the Messenger of the Lord of heavens and earth. Allah has warned the People of the Book against this behavior, stating that He is Witness over what they do, indicating their defiance of the knowledge conveyed to them by the Prophets. They rejected, denied and refused the very Messenger whom they were ordered to convey the glad tidings about his coming. Allah states that He is never unaware of what they do, and He will hold them responsible for their actions, R
(The Day whereon neither wealth nor sons will avail) ﴿26:88﴾.