Sahih BukhariVolume 5, Book 59, Number 660

Narrated Abu Huraira:

Allah's Apostle said, "While I was sleeping, I was given the treasures of the earth and two gold bangles were put in my hands, and I did not like that, but I received the inspiration that I should blow on them, and I did so, and both of them vanished. I interpreted it as referring to the two liars between whom I am present; the ruler of Sana and the Ruler of Yamaha."