Musannaf Ibn Abi Shayba 16:632

Abu Bakr narrated to us, he said: 'Abdah narrated to us, from Yahya ibn Sa'id, from al-Qasim, who said: When 'Aisha would go out for Hajj or 'Umrah, she would take her male slaves with her to prepare her howdah. They would fasten their legs to the belly of the mule, so she ordered them to wear *tababin* (loincloths).