It is narrated from Sayyiduna Uqbah bin Amir (may Allah be pleased with him) that his sister vowed that she would walk to the House (of Allah) barefoot and with her head uncovered, so the Messenger of Allah (peace and blessings be upon him) said: "Let her ride, cover her head and fast."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14967