Musnad Ahmad 30:713

Muhammad ibn Bakr and ‘Abd al-Razzaq narrated to us, they said: Ibn Jurayj informed us, Ibn Shihab informed me, Sa‘id ibn al-Musayyib narrated to me that he heard Abu Hurayrah saying—Ibn Bakr said: The Messenger of Allah (may Allah bless him and grant him peace) said—and ‘Abd al-Razzaq did not attribute it to the Prophet: "May Allah fight the Jews and the Christians; they took the graves of their prophets as places of worship."