Musnad Abu Ya'la al-Mawsili 160:46

Ibrahim ibn Sa'id narrated to us, Abu al-Yaman narrated to us, Shu'ayb narrated to us, 'Abdullah ibn Abi al-Husayn narrated to us, from Nafi' ibn Jubayr, from Ibn 'Abbas, who said: Abu Hurayrah informed me that the Prophet, may Allah bless him and grant him peace, said: "While I was sleeping, I saw in my hands two bracelets of gold. Their matter concerned me, so I blew upon them, and they flew away. I interpreted them as two liars who would emerge after me. And it was revealed to me that I should blow upon them, so I blew upon them, and they flew away. I interpreted them as two liars who would emerge after me. One of them was al-'Ansi, the master of San'a, and the other was Musaylimah."