Abd al-Rahman bin Hurmuz al-A'raj, the freed slave of Rabi'ah bin al-Harith, says that he heard Abu Hurayrah (may Allah be pleased with him) narrate that the Prophet (peace and blessings be upon him) said: "We are the last to come, but the foremost on the Day of Resurrection, except that they were given the Book before us and we after them. Then this day (Jumu'ah), which was made obligatory upon them, they differed about it, so Allah Almighty guided us, and people follow us: the Jews a day after us and the Christians two days after."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجمعة / 5565