Musnad Abu Ya'la al-Mawsili 160:184

Uqbah ibn Mukram narrated to us, Yunus ibn Bukayr narrated to us, from Muhammad ibn Ishaq, from Sa'id ibn Abi Sa'id, from his father, from Abu Hurayrah, that the Messenger of Allah (may Allah bless him and grant him peace) said: "A man from the people of the desert gifted me a she-camel from his camels, so I compensated him for it with six young she-camels. He spent his day displeased. By Allah, I will not accept a gift after this day of mine except from a Qurayshi, or a Thaqafi, or a Dawsī, or an Ansārī."