Appears 3 times in the Quran. (Root: نقم)
  1. And who is more unjust than he who is reminded of the communications of his Lord, then he turns away from them? Surely We will give punishment to the guilty.

  2. But if We should take you away, still We shall inflict retribution on them;

  3. On the day when We will seize (them) with the most violent seizing; surely We will inflict retribution.