Musnad Ahmad 551:4

Muhammad ibn Ja'far narrated to us, he said: Shu'bah narrated to us, from Isma'il, from Qays ibn Abi Hazim, from 'Amr ibn al-'As, he said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying openly, not secretly: "Indeed, the family of so-and-so are not my allies. My ally is only Allah and the righteous among the believers."