It was narrated that Umm ‘Atiyyah said:“The Messenger of Allah (ﷺ) commanded us to bring them (the women) out on the day of Fitr and the day of Nahr.” Umm ‘Atiyyah said: “We said: ‘What if one of them does not have an outer covering?’ He said: ‘Let her sister share her own outer covering with her.’”

English translation · Sunan Ibn Majah