Musnad Ahmad 27:1688

Ya'qub narrated to us, Ibn Akhi Ibn Shihab narrated to us, from his uncle, Salim ibn Abdullah informed me, from Abdullah ibn Umar, who said: The Messenger of Allah (peace and blessings of Allah be upon him) led us in the Isha prayer, which is what people call al-'Atamah. Then he turned and faced us and said: "Have you seen this night of yours? For at the head of one hundred years from it, no one who is on the face of the earth today will remain."