Khalid bin Abdullah bin Harmalah al-Mudliji (may Allah have mercy on him) narrates: The Messenger of Allah (peace and blessings be upon him) stopped at Usfan, and a man said: "Do you have any interest in the beautiful women and the fine camels of Banu Mudlij?" Among the people there was a man from Banu Mudlij, and this showed on his face. At this the Messenger of Allah (peace and blessings be upon him) said: "The best of a people is the one who defends his people, so long as he does not commit sin."
Hadith Referenceالمعجم الكبير للطبراني / باب الخاء / 4115