Musnad Abu Ya'la al-Mawsili 150:376

Al-Harith ibn Surayj narrated to us, Sufyan narrated to us, from Ibn Jurayj, from Ibn Abi Mulaykah, who said: It reached Aisha that a woman was wearing sandals, so she said: The Messenger of Allah (may Allah bless him and grant him peace) forbade the masculinization of women.