Musnad Ahmad 33:534

Aswad ibn Amir narrated to us, Sharik narrated to us, from Ash'ath ibn Siwar, from al-Hasan, from Jabir, from the Prophet, peace and blessings of Allah be upon him, who said: "No polytheist shall enter this mosque of ours after this year of ours, except for the People of the Book and their servants."