Musnad Ahmad 30:523

'Abd al-Razzaq narrated to us, Ma'mar informed us, from al-Zuhri, from Ibn al-Musayyib, from Abu Hurayrah, who said: A man asked the Messenger of Allah, peace and blessings of Allah be upon him: "Which deeds are best?" He said: "Faith in Allah." He said: "Then what?" He said: "Jihad in the way of Allah." He said: "Then what?" He said: "Then an accepted Hajj."