“O mankind, indeed We have created you from male and female and made you peoples and tribes that you may know one another. Indeed, the most noble of you in the sight of Allah is the most righteous of you. Indeed, Allah is Knowing and Acquainted.” (Qur’an 49:13)
Abu Barza reported that Allah’s Messenger (ﷺ) sent a person to a tribe amongst the tribes of Arabia. They reviled him and beat him. He came to Allah’s Messenger (ﷺ) and narrated to him (the story of atrocities perpetrated upon him by the people of the tribe). Thereupon he (the Holy Prophet) said:
If you were to come to the people of ‘Oman, they would have neither reviled you nor beaten you.