Surah Al-An'am (The Cattle), Verse 121

وَلَا تَاْكُلُوْا مِمَّا لَمْ یُذْكَرِ اسْمُ اللّٰهِ عَلَیْهِ وَاِنَّهٗ لَفِسْقٌ وَاِنَّ الشَّیٰطِیْنَ لَیُوْحُوْنَ اِلٰۤی اَوْلِیٰٓـِٕهِمْ لِیُجَادِلُوْكُمْ وَاِنْ اَطَعْتُمُوْهُمْ اِنَّكُمْ لَمُشْرِكُوْنَ 

Wa laa ta'kuloo mimmaa lam yuzkaris mullaahi 'alaihi wa innahoo lafisq; wa innash Shayaateena la yoohoona ilaaa awliyaaa'ihim liyujaadilookum wa in ata'tumoohum innakum lamushrikoon

“Eat not of (meats) on which Allah's name hath not been pronounced: That would be impiety. But the evil ones ever inspire their friends to contend with you if ye were to obey them, ye would indeed be Pagans.”

Quran 6:121 (Yusuf Ali Translation)