Musnad Ahmad 789:9

'Abd al-Samad ibn 'Abd al-Warith narrated to us, Mahdi ibn Maymun narrated to us, Jabir Abu al-Wazi' narrated to us, he said: I heard Abu Barzah saying: The Messenger of Allah (may Allah bless him and grant him peace) sent a man to a tribe among the Arab tribes, and they beat him and insulted him. He returned to the Prophet (may Allah bless him and grant him peace) and complained about that to him. The Prophet (may Allah bless him and grant him peace) said to him: "If you had come to the people of Oman, they would not have beaten you nor insulted you."