Rejection of false excuses for disbelief

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

[We revealed it] lest you say, "The Scripture was only sent down to two groups before us, but we were of their study unaware,"