Musnad Ahmad 1201:3

Yazid ibn Harun narrated to us, he said: Al-Mas'udi informed us, and Abu 'Abd al-Rahman al-Muqri' said: Al-Mas'udi narrated to us, from 'Abd al-Malik ibn 'Umayr, from a man from the family of Abu Hathmah, from al-Shifa' bint 'Abd Allah, that the Prophet, peace and blessings of Allah be upon him, was asked: "Which deeds are best?" He said: "Faith in Allah, and Jihad in the way of Allah, and an accepted Hajj." Abu 'Abd al-Rahman said: "Or an accepted Hajj."