Musnad Ahmad 1153:988

'Affan narrated to us, he said: Hammad ibn Salamah narrated to us, he said: 'Abdullah ibn Shaddad informed us, from Abu 'Udrah—and he had met the Prophet, peace and blessings of Allah be upon him—from 'Aishah: "That the Messenger of Allah, peace and blessings of Allah be upon him, forbade men and women from the bathhouses. Then he granted a concession to the men to enter them wearing waist-wrappers."