Musnad Ahmad 565:1

Muhammad ibn Bakr narrated to us, Abd al-Hamid—meaning Ibn Ja'far—informed us, he said: My father informed me, from Ziyad ibn Mina, from Abu Sa'id ibn Abi Fadala al-Ansari—and he was one of the Companions—that he said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, say: "When Allah gathers the first and the last for a Day about which there is no doubt, a caller will call out: 'Whoever associated anyone else with Allah in a deed he performed for Him, let him seek his reward from someone other than Allah, for Allah is the most independent of all partners from shirk (associating partners with Him).'"