Musnad Ahmad 1119:2

Yazid ibn Harun narrated to us, he said: Sufyan ibn Husayn informed us, from Hisham ibn Yusuf, from Awf ibn Malik, who said: I sought permission to enter upon the Prophet, peace and blessings of Allah be upon him, and I said: "Shall I enter, all of me or part of me?" He said: "Enter, all of you." So I entered upon him while he was performing ablution in a measured manner. He said to me: "O Awf ibn Malik, [count] six before the Hour: the death of your Prophet—take one—then the conquest of Bayt al-Maqdis (Jerusalem), then a death that will seize you, in which you will die off just as sheep die off, then the appearance of tribulations, and wealth will become abundant until a single man is given one hundred dinars and he is dissatisfied with it. Then the Banu al-Asfar (the Byzantines/Romans) will come to you under eighty banners; under each banner will be twelve thousand."