The women of Banu Abd al-Dar (may Allah be pleased with them), who saw the Messenger of Allah (peace and blessings be upon him), say: We went into the house of Ibn Abi Husayn, and through a broken door we saw the Messenger of Allah (peace and blessings be upon him) hastening in the place of sa'i, until, when he reached the lane of Banu so-and-so, he turned towards the people and said: "O people, perform the sa'i, for the sa'i has been prescribed for you."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9365