«لا تصدقوا أهل الكتاب ولا تكذبوهم و {قُولُوا آمَنَّا بِاللَّهِ وَمَا أُنْزِلَ إِلَيْنَا} الآية»
The Prophet (peace and blessings be upon him) said:
"Neither affirm the People of the Book nor deny them; rather, say: We believe in Allah and in what has been revealed to us."
Hadith Referenceصحیح الجامع الصغیر / حرف اللام ألف / 7346