I'm trying to find a hadith I heard long ago. It was like, do your own prayers and live peacefully (to mushriks) and don't mess with out prayers. And we won't mess with you. Something like that. I can't remember exactly.
May be your looking for this ... http://quran.com/109
Say, "O disbelievers,
I do not worship what you worship.
Nor are you worshippers of what I worship.
Nor will I be a worshipper of what you worship.
Nor will you be worshippers of what I worship.
For you is your religion, and for me is my religion."
Surat Al-Kāfirūn (The Disbeliever)
May the creator guide us all.