Musnad Ahmad 32:352

Abu Ubaydah al-Haddad narrated to us, Abd al-Rahman ibn Budayl ibn Maysarah narrated to us, he said: My father narrated to me, from Anas, he said: The Messenger of Allah, peace and blessings of Allah be upon him, said: "Indeed, Allah has families among the people." He said: It was said: Who are they, O Messenger of Allah? He said: "The people of the Quran are the family of Allah and His chosen ones."