Musnad Ahmad 1200:0

Narrated to us by Abdullah, who said: Narrated to us my father, who said: Narrated to us Waki’, from Sufyan, from Mansur, from Ibrahim, from Suwayd ibn Ghafalah, from Qutilah bint Sayfi, who said: I came to the Prophet (peace be upon him) and he said: "O Qutilah, O woman of the Banu Asad, you are asking about the Hajj?" I said: "Yes, O Messenger of Allah." He said: "Perform the Hajj, for Allah has written the Hajj for you."