He (the inquirer ) again said: Messenger of Allah, when would there be the hour (of Doom)?
He (the Holy Prophet ﷺ) replied: The one who is asked about it is no better informed than the inquirer. I, however, narrate some of its signs (and these are):
When the slave-girl will give birth to he master, when the naked, barefooted would become the chiefs of the people – these are some of the signs of (Doom). (Moreover) when the shepherds of the black (camels) would exult themselves in buildings, this is one of the signs of (Doom). (Doom) is one of the five (happenings wrapped in the unseen) which no one knows but Allah.
-Sahih Muslim Book 1 Hadith 5