Musnad Ahmad 27:1756

Sulayman ibn Dawud narrated to us, Abd al-Rahman ibn Abi al-Zinad narrated to us, from Musa ibn Uqbah, from Salim ibn Abd Allah, from Abd Allah ibn Umar, [who said]: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "I saw in a dream a black woman with disheveled hair, [who had been] expelled from Medina and settled in Mahya'ah. I interpreted it in the dream as the plague of Medina, which Allah the Exalted was moving to Mahya'ah."