Musnad Ahmad 30:2006

Hawdha narrated to us, 'Awf narrated to us, from Shahr ibn Hawshab, from Abu Hurayrah, from the Prophet, peace and blessings of Allah be upon him, who said: "Indeed, among the signs of the Hour is that the shepherds of sheep will be seen as the heads of the people, and that the barefoot, naked, hungry ones will be seen competing in building. And that the slave woman will give birth to her master and her mistress."