Surah Al-An'am (The Cattle), Verse 150

قُلْ هَلُمَّ شُهَدَآءَكُمُ الَّذِیْنَ یَشْهَدُوْنَ اَنَّ اللّٰهَ حَرَّمَ هٰذَا فَاِنْ شَهِدُوْا فَلَا تَشْهَدْ مَعَهُمْ وَلَا تَتَّبِعْ اَهْوَآءَ الَّذِیْنَ كَذَّبُوْا بِاٰیٰتِنَا وَالَّذِیْنَ لَا یُؤْمِنُوْنَ بِالْاٰخِرَةِ وَهُمْ بِرَبِّهِمْ یَعْدِلُوْنَ 

Qul halumma shuhadaaa'akumul lazeena yash hadoona annal laaha harrama haazaa fa in shahidoo falaa tashhad ma'ahum; wa laa tattabi' ahwaaa'al lazeena kazzaboo bi Aayaatinaa wallazeena laa yu'minoona bil Aakhirati wa hum bi Rabbihim ya'diloon

“Say: "Bring forward your witnesses to prove that Allah did forbid so and so." If they bring such witnesses, be not thou amongst them: Nor follow thou the vain desires of such as treat our signs as falsehoods, and such as believe not in the Hereafter: for they hold others as equal with their Guardian-Lord.”

Quran 6:150 (Yusuf Ali Translation)