Musnad Ahmad 30:119

Al-Walid ibn Muslim Abu al-Abbas narrated to us, al-Awza'i narrated to us, Hassan ibn 'Atiyyah narrated to me, Muhammad ibn Abi 'Aishah narrated to me, that he heard Abu Hurairah saying: The Messenger of Allah, peace and blessings of Allah be upon him, said: "When one of you finishes the final Tashahhud, let him seek refuge in Allah from four things: from the punishment of Hell, from the punishment of the grave, from the trial of life and death, and from the evil of the False Messiah (al-Masih ad-Dajjal)."