Sayyidah Habibah (may Allah be pleased with her) said: I was with some women of Quraysh in the house of Abu Husayn, while the Messenger of Allah (peace and blessings be upon him) was performing the sa'i between Safa and Marwah, and I heard him (peace and blessings be upon him) say: "Perform the sa'i; the sa'i has been made obligatory upon you." She said: And his (peace and blessings be upon him) waist-wrapper was swirling around him (peace and blessings be upon him) from the intensity of the sa'i.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20944