Musnad Ahmad 944:35

Sakan ibn Nafi’ Abu al-Hasan al-Bahili narrated to us, Salih—meaning Ibn Abi al-Akhdar—narrated to us, from al-Zuhri, ‘Umarah ibn Khuzaymah informed me that Khuzaymah saw in a dream that he was prostrating upon the forehead of the Messenger of Allah, peace and blessings of Allah be upon him. He said: So Khuzaymah came to the Messenger of Allah, peace and blessings of Allah be upon him, and informed him. He said: So the Messenger of Allah, peace and blessings of Allah be upon him, lay down, then said to him: "Your dream has come true." So he prostrated upon the forehead of the Messenger of Allah, peace and blessings of Allah be upon him.