Musnad Abu Ya'la al-Mawsili 112:21

Abu Khaythama narrated to us, Muhammad ibn al-Zibriqan Abu Hammam al-Ahwazi narrated to us, from Yunus, from al-Hasan, from Anas, that the Messenger of Allah (may Allah bless him and grant him peace) said: "A resident shall not sell for a bedouin, even if he is his brother or his father."