Sayyidah Umm Atiyyah (may Allah be pleased with her) narrated: I said, "O Messenger of Allah (peace and blessings be upon him)! If one of us does not have a shawl?" So the Prophet (peace and blessings be upon him) said: "Her sister should let her wear a part of her own shawl."
Hadith Referenceمسند اسحاق بن راهويه / كتاب العيدين / 225