An-Nisa' (The Women)
Surah 4 · Verse 148
Allah does not like manifest evil in speech, except (from) one to whom injustice was done, and Allah is Hearing, Knowing.
One should not speak ill about others except when injustice is done to him. If one pardons such an injustice, exposing this good act or hiding it, Allah (SWT) knows it and He too pardons as He has power over everything.
