Musnad Ahmad 11:4

'Affan and 'Abd al-Samad narrated to us, they said: Hammad ibn Salamah narrated to us, Khalid al-Hadhdha' informed us, from 'Abdullah ibn Shaqiq, from 'Abdullah ibn Suraqah, from Abu 'Ubaydah ibn al-Jarrah, who said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, say: "There has been no prophet after Nuh except that he warned his people about the Dajjal, and I am warning you about him." He said: The Messenger of Allah, peace and blessings of Allah be upon him, described him to us and said: "And perhaps some of those who have seen me or heard my speech will live to see him." They said: "O Messenger of Allah, will our hearts on that day be like they are today?" He said: "Or better."