Quran 6:156 Al-An'am, ayah 156 of 165

أَن تَقُولُوٓا۟ إِنَّمَآ أُنزِلَ ٱلْكِتَـٰبُ عَلَىٰ طَآئِفَتَيْنِ مِن قَبْلِنَا وَإِن كُنَّا عَن دِرَاسَتِهِمْ لَغَـٰفِلِينَ ۝١٥٦

6:156 Lest ye should say: The Scripture was revealed only to two sects before us, and we in sooth were unaware of what they read;