Musnad Ahmad 1153:484

Yunus narrated to us, he said: 'Abd al-Wahid narrated to us, from Habib ibn Abi 'Amrah, he said: 'A'ishah bint Talhah narrated to us, that 'A'ishah, the Mother of the Believers, said: I said to the Prophet, peace and blessings of Allah be upon him: "O Messenger of Allah, shall we not perform Jihad with you?" She said: The Messenger of Allah, peace and blessings of Allah be upon him, said: "For you is the best of Jihad, and the most beautiful of it: Hajj, a mabrur (accepted/righteous) Hajj." 'A'ishah said: "So I will never abandon Hajj after having heard this from the Messenger of Allah, peace and blessings of Allah be upon him."