Musnad Ahmad 33:594

Hashim narrated to us, al-Mubarak narrated to us, Bakr ibn Abdullah al-Muzani narrated to us, from Jabir ibn Abdullah, from the Prophet, peace and blessings of Allah be upon him, who said: "The two determiners: Whoever meets Allah, the Mighty and Majestic, while not associating anything with Him, enters Paradise. And whoever meets Allah, the Mighty and Majestic, while associating [others] with Him, enters the Fire."