Surah At-Tawbah, Verse 47

لَوۡ خَرَجُواْ فِيكُم مَّا زَادُوكُمۡ إِلَّا خَبَالٗا وَلَأَوۡضَعُواْ خِلَٰلَكُمۡ يَبۡغُونَكُمُ ٱلۡفِتۡنَةَ وَفِيكُمۡ سَمَّٰعُونَ لَهُمۡۗ وَٱللَّهُ عَلِيمُۢ بِٱلظَّٰلِمِينَ٤٧

law kharajū fīkum mā zādūkum illā khabālan wala-awḍaʿū khilālakum yabghūnakumu l-fit'nata wafīkum sammāʿūna lahum wal-lahu ʿalīmun bil-ẓālimīna

Had they gone forth with you, they would not have increased you except in confusion, and they would have been active among you, seeking [to cause] you fitnah [i.e., chaos and dissension]. And among you are avid listeners to them. And Allāh is Knowing of the wrongdoers.