Musnad Ahmad 30:1667

Al-Khuza'i narrated to us, he said: Layth informed us, from Yazid ibn al-Had, from Ibn Shihab, from Sa'id ibn al-Musayyib, from Abu Hurayrah, he said: The Messenger of Allah, peace and blessings of Allah be upon him, said: "May Allah curse the Jews; they took the graves of their prophets as places of worship."