Musnad Ahmad 31:884

'Abd al-Razzaq narrated to us, Sufyan and Hashim informed us, Shu'bah narrated to us, from al-A'mash, from Dhakwan, from Abu Sa'id al-Khudri, who said: The Messenger of Allah (ﷺ) said: "No man who believes in Allah and His Messenger hates the Ansar." And Hashim said: "Believes in Allah and the Last Day."