Musnad Ahmad 30:588

'Abd al-Razzaq narrated to us, Ma'mar narrated to us, from al-A'mash, from Abu Salih, from Abu Hurayrah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "We are the last, the first on the Day of Resurrection. We are the first of the people to enter Paradise, although they were given the Book before us, and we were given it after them. So Allah guided us by His permission to the truth regarding that which they differed over. So this day which Allah has guided us to—and the people are followers to us in it—is for the Jews tomorrow, and for the Christians the day after tomorrow."