Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: "Do not ask the People of the Book about anything, for they cannot guide you when they have already led themselves astray. Either they will tell you something true and you will deny it, or something false and you will believe it."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 9724