Surah Al-An'am, ayah 123

6:123

وَكَذَٰلِكَ جَعَلۡنَا فِي كُلِّ قَرۡيَةٍ أَكَٰبِرَ مُجۡرِمِيهَا لِيَمۡكُرُواْ فِيهَاۖ وَمَا يَمۡكُرُونَ إِلَّا بِأَنفُسِهِمۡ وَمَا يَشۡعُرُونَ ١٢٣

Wakadhālika ja'alnā fī kulli qaryatin akābira mujrimīhā liyamkurū fīhā wamā yamkurūna illā bi anfusihim wamā yash'urūn

And thus We have placed within every city the greatest of its criminals to conspire therein. But they conspire not except against themselves, and they perceive [it] not.