Surah Al-An'am (The Cattle), Verse 123

وَكَذٰلِكَ جَعَلْنَا فِیْ كُلِّ قَرْیَةٍ اَكٰبِرَ مُجْرِمِیْهَا لِیَمْكُرُوْا فِیْهَا وَمَا یَمْكُرُوْنَ اِلَّا بِاَنْفُسِهِمْ وَمَا یَشْعُرُوْنَ ۟

Wa kazaalika ja'alnaa fee kulli qaryatin akaabira mujrimeehaa liyamkuroo feehaa wa maa yamkuroona illaa bi anfusihim wa maa yash'uroon

“Thus have We placed leaders in every town, its wicked men, to plot (and burrow) therein: but they only plot against their own souls, and they perceive it not.”

Quran 6:123 (Yusuf Ali Translation)