Musnad Ahmad 1153:947

'Abd al-Razzaq narrated to us, he said: Sufyan informed us, from 'Ali ibn al-Aqmar, from Abu Hudhayfah, a man from the companions of 'Abdullah, from 'Aishah, she said: I went to imitate a woman, or a man, in the presence of the Messenger of Allah, peace and blessings of Allah be upon him. The Messenger of Allah, peace and blessings of Allah be upon him, said: "I would not love that I imitated anyone, even if I were to have such and such," and he magnified that.