Musnad Abu Ya'la al-Mawsili 150:213

'Abd al-A'la narrated to us, Khalid bin 'Abdullah narrated to us, from Habib bin Abi 'Amrah, from 'A'ishah bint Talhah, from 'A'ishah, the Mother of the Believers, that she said to the Messenger of Allah (may Allah bless him and grant him peace): "I see that Jihad is the best of deeds, so should we not perform Jihad?" He said: "But the best of Jihad is an accepted Hajj."