Musnad Abu Ya'la al-Mawsili 150:323

Muhammad ibn 'Abbad narrated to us, Sufyan narrated to us, from 'Abd al-Karim ibn Abi al-Mukhariq, from Qays ibn Muslim, from al-Hasan ibn Muhammad, who said: 'Aishah said: "A piece of gazelle meat was gifted to the Messenger of Allah, may Allah bless him and grant him peace, while he was in the state of ihram, so he returned it and did not eat it."