Sahih Al Bukhari Hadith Number 1520

Narrated `Aisha: (the mother of the faithful believers) I said, “O Allah’s Messenger (peace eb upon him)! We consider Jihad as the best deed.” The Prophet (peace be upon him) said, “The best Jihad (for women) is Hajj Mabrur. “

25  Hajj (Pilgrimage)
Hadith number 1520
Volume no 2
Chapter: 4 (The superiority of Al-Hajj-ul-Mabrur)