Musnad Ahmad 938:54

Muhammad ibn Ja‘far narrated to us, Shu‘bah narrated to us, from ‘Amr ibn Murrah, from Abu al-Bakhtari al-Ta’i, from Abu Sa‘id al-Khudri, from the Messenger of Allah (peace and blessings of Allah be upon him) that he said: When this verse was revealed: {When the victory of Allah has come and the conquest} [An-Nasr: 1], the Messenger of Allah (peace and blessings of Allah be upon him) recited it until he finished it, and he said: "The people are in a group, and I and my companions are in a group." And he said: "There is no migration after the conquest, but there is jihad and intention." Marwan said to him: "You have lied." And Rafi‘ ibn Khadij and Zayd ibn Thabit were with him, and they were sitting with him on the couch. Abu Sa‘id al-Khudri said: "If these two wished, they would have told you." Marwan raised the whip over him to strike him, but when they saw that, they said: "He has spoken the truth."