Musnad Abu Ya'la al-Mawsili 209:7

Muhammad ibn Isma'il ibn Abi Samina al-Basri narrated to us, Muhammad ibn Khalid al-Hanafi narrated to us, 'Abdullah ibn Ja'far al-Makhrami narrated to us, from 'Uthman al-Akhnasi, from 'Abd al-Rahman ibn Sa'd ibn Yarbu', from Umm Salamah, who said: The Messenger of Allah (may Allah bless him and grant him peace) said to us during the Farewell Pilgrimage: "It is only this pilgrimage, then sitting upon the backs of the mats in the houses." Ibn Abi Samina said: "It is only Sa'id," but this is how he said it.