Sahih Muslim Book 29, Hadith Number 5651.

Abu Huraira reported Allah’s Messenger (may peace be upon him) as saying: While I was sleeping, the treasures of the earth were presented to me and I was made to wear in my hands two gold bangles. I felt a sort of burden upon me and I was disturbed and it was suggested to me that I should blow over them, so I blew and both of them disappeared. I interpreted them as two great liars who would appear at any time, one is the inhabitant of Sana’ and the other is that of Yamama.