Against Suspicion, Backbiting, and Racism in Qur'an
49:13 O ye who believe! avoid most of suspicions; for suspicion in some cases is a sin. And spy not, nor backbite one another. Would any of you like to eat the flesh of his brother who is dead? Certainly you would loath it. And fear Allah, surely, Allah is Oft-Returning with compassion and is Merciful.
49:14 O mankind, We have created you from a male and a female; and We have made you into tribes and sub-tribes that you may recognize one another. Verily, the most honorable among you, in the sight of Allah, is he who is the most righteous among you. Surely, Allah is All-Knowing, All-Aware.