Musnad Ahmad 30:1642

Muhammad ibn Abdullah ibn al-Zubayr narrated to us, Umar ibn Sa’id narrated to us, from ‘Ata’, from Abu Hurayrah, who said: A man came to the Messenger of Allah, peace and blessings of Allah be upon him, and said: "I saw my head being struck, and I saw it rolling away." The Messenger of Allah, peace and blessings of Allah be upon him, smiled, then said: "Satan plays with one of you in his dream, frightening him, then he wakes up and tells the people about it."