Musnad Ahmad 1119:27

Hashim narrated to us, he said: Ya'la ibn 'Ata' informed us, from Muhammad ibn Abi Muhammad, from 'Awf ibn Malik al-Ashja'i, who said: I came to the Prophet, peace and blessings of Allah be upon him, while he was in a curtained enclosure of his. I said: "May I enter?" He said: "Enter." I said: "All of me?" He said: "All of you." When I sat down, he said: "Count six things that will occur before the Hour. The first of them is the death of your Prophet." I wept. Hashim said: I do not know with which one he began. "Then the conquest of Bayt al-Maqdis (Jerusalem), then a tribulation that will enter every house of hair and clay (i.e., every tent and dwelling), then wealth will overflow among you until a man is given one hundred dinars and he remains dissatisfied, then a plague that will occur among the people like the disease that kills sheep." He said: "And a truce that will be between you and the Children of Yellow (the Byzantines), then they will betray you and march against you under eighty banners." Ya'la said: "Under sixty banners, under each banner twelve thousand."