6:156
أَن تَقُولُوٓا۟ إِنَّمَآ أُنزِلَ ٱلْكِتَـٰبُ عَلَىٰ طَآئِفَتَيْنِ مِن قَبْلِنَا وَإِن كُنَّا عَن دِرَاسَتِهِمْ لَغَـٰفِلِينَ
an taqūlū innamā unzila l-kitābu ʿalā ṭāifatayni min qablinā wa-in kunnā ʿan dirāsatihim laghāfilīna
lest you say, ‘Scriptures were only sent down to two communities before us: we were not aware of what they studied,’
Lest you (pagan Arabs) should say: "The Book was sent down only to two sects before us (the Jews and the Christians), and for our part, we were in fact unaware of what they studied."