Musnad Ahmad 31:417

Muhammad ibn Ja'far and Hashim ibn al-Qasim narrated to us, they said: Shu'bah narrated to us, from Sulayman, from Dhakwan, from Abu Sa'id al-Khudri, from the Prophet, peace and blessings of Allah be upon him, that he said: "No man who believes in Allah and the Last Day hates the Ansar."