Musnad Ahmad 1153:1520

'Abd al-Rahman narrated to us, from Sufyan, from 'Asim, from Zirr, from 'Aisha, who said: "The Messenger of Allah (peace and blessings of Allah be upon him) did not leave behind a dinar, nor a dirham, nor a sheep, nor a camel." Sufyan said: "To my knowledge, and I am in doubt regarding the male slave and the female slave."