Musnad Ahmad 67:3

Surayj ibn al-Nu‘man narrated to us, he said: ‘Abbad informed us, from al-Hajjaj, from ‘Abd al-Malik ibn al-Mughirah al-Ta’ifi, from ‘Abd al-Rahman ibn al-Baylamani, from ‘Amr ibn Aws, from al-Harith ibn Aws, he said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Whoever performs Hajj or ‘Umrah, let his final act be the circumambulation (Tawaf) of the House." ‘Umar ibn al-Khattab said to him: "You have fallen from your hands; you heard this from the Messenger of Allah (peace and blessings of Allah be upon him), then you did not tell me?"