Musnad Ahmad 30:281

Sufyan narrated to us, from Ibn Tawus, from his father, from Abu Hurairah, and Abu al-Zinad, from al-A’raj, from Abu Hurairah, attributing it to the Prophet (peace and blessings of Allah be upon him): "We are the last, and we are the foremost on the Day of Resurrection, except that every nation was given the Book before us, and we were given it after them. Then this day which Allah, the Mighty and Majestic, prescribed for them, but they differed concerning it, so Allah guided us to it. The people are followers to us in it: for the Jews is tomorrow, and for the Christians is the day after tomorrow." One of them said: "Baid anna" (except that), and the other said: "Ba-yad" (except that).