Musannaf Ibn Abi Shayba 37:354

Waki' narrated to us, from al-Awza'i, from Hassan ibn 'Atiyyah, from Muhammad ibn Abi 'Aishah, from Abu Hurayrah; and from Yahya, from Abu Salamah, from Abu Hurayrah, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "When one of you performs the tashahhud, let him seek refuge in Allah from the evil of the trial of the False Messiah (al-Masih al-Dajjal)."