Hadith 8:2535
Abu Bakr narrated to us, he said: Humayd narrated to us, from Layth, from Tawus, who said: A woman shall not perform Hajj except with her husband or a Mahram (a male relative whom she is permanently prohibited from marrying).
حدثنا أبو بكر قال نا حميد عن ليث عن طاوس قال لا تحج المرأة إلا مع زوجها أو ذي محرم