Musannaf Ibn Abi Shayba 3:6411

'Affan narrated to us, from Hammad bin Salamah, from 'Ali bin Zayd, from Sa'id bin al-Musayyib, from 'Aishah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "If I were to command anyone to prostrate to anyone, I would have commanded the women to prostrate to their husbands."