Musnad Ahmad 786:0

Narrated to us by Yahya ibn Sa’id, from Ibn Jurayj, who said: I heard Mujammi’ ibn Jariyah al-Ansari say: I heard the Messenger of Allah (ﷺ) say: "‘Isa (Jesus), son of Maryam, will kill the Dajjal at the gate of Ludd." He said: And I heard him say: "The earth will not be constricted upon the Dajjal except for the sanctuaries (the Haram of Makkah and Madinah)."