Musnad Ahmad 1034:82

Muhammad ibn Abdullah ibn al-Zubayr narrated to us, Sa’d ibn Aws narrated to us, from Bilal al-‘Absi, from Hudhayfah, who said: "There were no tents after the tents that were with the Messenger of Allah, may Allah bless him and grant him peace, which were defended against harm, more than the tents that were placed in this spot." And he said: "You, O assembly of Arabs, are committing matters today that were, during the time of the Messenger of Allah, may Allah bless him and grant him peace, hypocrisy in its true form."