Musnad Ahmad 1153:900

'Affan narrated to us, he said: Hammad ibn Salamah narrated to us, he said: Hammad informed us, from Ibrahim, from al-Aswad, from 'Aishah, that a dabb (lizard) was gifted to the Messenger of Allah, may Allah bless him and grant him peace, and he did not eat it. 'Aishah said: So I said: "O Messenger of Allah, shall I not feed it to the poor?" The Prophet, may Allah bless him and grant him peace, said: "Do not feed them from what you do not eat."