Musnad Ahmad 1153:1310

'Abd al-Razzaq narrated to us, Sufyan informed us, from Mu'awiyah ibn Ishaq, from 'A'ishah bint Talhah, from 'A'ishah, the Mother of the Believers, she said: I asked the Prophet, peace and blessings of Allah be upon him, about Jihad. He said: "Your Jihad is the Hajj," or he said: "Your Jihad is the Hajj."