Prohibition to trust jewish

AAL-E-IMRAN (THE FAMILY OF 'IMRAN, THE HOUSE OF 'IMRAN) : 118-120

3:118. O ye who believe! Take not into your intimacy those outside your ranks: They will not fail to corrupt you. They only desire your ruin: Rank hatred has already appeared from their mouths: What their hearts conceal is far worse. We have made plain to you the Signs, if ye have wisdom.

3:119. Ah! ye are those who love them, but they love you not,- though ye believe in the whole of the Book. When they meet you, they say, "We believe": But when they are alone, they bite off the very tips of their fingers at you in their rage. Say: "Perish in you rage; Allah knoweth well all the secrets of the heart."
3:120. If aught that is good befalls you, it grieves them; but if some misfortune overtakes you, they rejoice at it. But if ye are constant and do right, not the least harm will their cunning do to you; for Allah Compasseth round about all that they do.