005.047
Let the People of the Gospel judge by that which Allah hath revealed therein. Whoso judgeth not by that which Allah hath revealed: such are evil-livers.
005.068 Say O People of the Scripture!
Ye have naught (of guidance) till ye observe the Torah and the Gospel and that which was revealed unto you from your Lord. That which is revealed unto thee (Muhammad) from thy Lord is certain to increase the contumacy and disbelief of many of them. But grieve not for the disbelieving folk.
029.046 And argue not with the People of the Scripture unless it be in (a way) that is better, save with such of them as do wrong; and say:
We believe in that which hath been revealed unto us and revealed unto you; our God and your God is One, and unto Him we surrender.
042.013
He hath ordained for you that religion which He commended unto Noah, and that which We inspire in thee (Muhammad), and that which We commended unto Abraham and Moses and Jesus, saying: Establish the religion, and be not divided therein. Dreadful for the idolaters is that unto which thou callest them. Allah chooseth for Himself whom He will, and guideth unto Himself him who turneth (toward Him).
042.014 And they were not divided until after the knowledge came unto them, through rivalry among themselves; and had it not been for a Word that had already gone forth from thy Lord for an appointed term, it surely had been judged between them. And those who were made to inherit the Scripture after them are verily in hopeless doubt concerning it.
042.015 Unto this, then, summon (O Muhammad). And be thou upright as thou art commanded, and follow not their lusts, but say:
I believe in whatever scripture Allah hath sent down, and I am commanded to be just among you. Allah is our Lord and your Lord. Unto us our works and unto you your works; no argument between us and you. Allah will bring us together, and unto Him is the journeying.
http://www.islam101.com/quran/QTP/index.htm