Musnad Ahmad 1153:2297

Ya'qub narrated to us, he said: My father narrated to us, from Ibn Ishaq, he said: Abdullah ibn Abi Bakr ibn Muhammad ibn 'Amr ibn Hazm narrated to me, from 'Amrah bint 'Abd al-Rahman, from 'Aishah, the wife of the Prophet, may Allah bless him and grant him peace, who said: "The verse of stoning and the ten sucklings of an adult were revealed, and they were on a sheet under a bed in my house. When the Messenger of Allah, may Allah bless him and grant him peace, became ill, we were preoccupied with his affair, and a small creature of ours entered and ate it."