Musnad Ahmad 1153:1393

Muhammad ibn Ja‘far narrated to us, he said: Shu‘bah narrated to us, from Mansur, from Ibrahim, from al-Aswad, from ‘Aishah, she said: "I used to twist the garlands for the sacrificial animals (hady) of the Messenger of Allah, peace and blessings of Allah be upon him, with my own hands. Then, nothing that was lawful for him became unlawful for him."