Musnad Ahmad 33:336

Muhammad ibn Bakr narrated to us, Ibn Jurayj informed us, Abu al-Zubayr informed me, from Jabir ibn Abdullah, who said: I heard the Prophet, peace and blessings of Allah be upon him, saying: "You ask me about the Hour, and its knowledge is only with Allah. And I swear by Allah, there is not, upon the earth today, a breathing soul that will still be alive after one hundred years."