﴿ أَن تَقُولُوٓا۟ إِنَّمَآ أُنزِلَ ٱلْكِتَٰبُ عَلَىٰ طَآئِفَتَيْنِ مِن قَبْلِنَا وَإِن كُنَّا عَن دِرَاسَتِهِمْ لَغَٰفِلِينَ ﴾

“It has been given to you] lest you say, "Only unto two groups of people, [both of them] before our time, has a divine writ been bestowed from on high and we were indeed unaware of their teachings";”

Please check ayah 6:157 for complete tafsir.