Musnad Ahmad 30:3812

Hashim narrated to us, Zuhayr narrated to us, Suhayl narrated to us, from his father, from Abu Hurayrah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "The Hour will not be established until time draws near, so that a year is like a month, and a month is like a week, and a week is like a day, and a day is like an hour, and an hour is like the burning of a palm frond." Suhayl claimed [this].