Musannaf Ibn Abi Shayba 28:1062

Affan narrated to us, he said: Hammad bin Salamah narrated to us, from Ali bin Zaid, from Abu Salamah bin Abd al-Rahman, from Aisha, she said: The Messenger of Allah (may Allah bless him and grant him peace) raced with me, and I outpaced him. Hammad said: [He meant] on foot.