Musnad Ahmad 592:1

'Abd al-Razzaq narrated to us, Ma'mar narrated to us, from al-Zuhri, from 'Abd Allah ibn 'Abd Allah ibn Tha'labah al-Ansari, from 'Abd al-Rahman ibn Zayd al-Ansari, from Mujammi' ibn Jariyah, who said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "The son of Mary will kill the Dajjal at the gate of Ludd," or "beside Ludd."