Musnad Ahmad 30:1143

Abu Abd al-Rahman narrated to us, Sa'id ibn Abi Ayyub narrated to us, Muhammad ibn 'Ajlan narrated to me, from Sa'id ibn Abi Sa'id al-Maqburi, from Abu Hurayrah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Whoever reaches sixty years of age, Allah has left him no excuse regarding his lifespan."