Musnad Ahmad 1153:478

Harun narrated to us, Abdullah ibn Wahb narrated to us, he said: And Haywah said: Abu Sakhr informed me, from Ibn Qusayt, from Urwah ibn al-Zubayr, from Aisha, the wife of the Prophet, may God bless him and grant him peace, that the Messenger of God, may God bless him and grant him peace, ordered a horned ram that walked in blackness, looked in blackness, and lay down in blackness. It was brought to him so that he might sacrifice it. Then he said: "O Aisha, bring me the knife." Then he said: "Sharpen it with a stone." So I did. Then he took it and took the ram and laid it down, then he slaughtered it and said: "In the name of God. O God, accept [this] from Muhammad, the family of Muhammad, and the nation of Muhammad." Then he sacrificed it, may God bless him and grant him peace.