Musnad Ahmad 717:2

Yunus narrated to us, Hammad—meaning Ibn Salamah—narrated to us, from Sa’id al-Jurayri, from Abdullah ibn Shaqiq, from Mihjan ibn al-Adra’, that the Messenger of Allah (peace and blessings of Allah be upon him) addressed the people and said: "The Day of Deliverance, and what is the Day of Deliverance? The Day of Deliverance, and what is the Day of Deliverance?" [repeating it] three times. It was said to him: "And what is the Day of Deliverance?" He said: "The Dajjal will come and ascend Uhud, then he will look at Medina and say to his companions: 'Do you see this white palace? This is the mosque of Ahmad.' Then he will come to Medina and find at every mountain pass of it an angel with a drawn sword. Then he will come to the salt marsh of al-Jurf and pitch his tent. Then Medina will shake three times, and there will not remain a male hypocrite, nor a female hypocrite, nor a male transgressor, nor a female transgressor, but that they will go out to him. That is the Day of Deliverance."