Language:
كتاب الجهاد والسير
56
Fighting for the Cause of Allah (Jihaad)
(62)
Chapter: The Jihad of women
(62)
باب جِهَادِ النِّسَاءِ

Narrated `Aisha:

the mother of the faithful believers: The Prophet (ﷺ) was asked by his wives about the Jihad and he replied, "The best Jihad (for you) is (the performance of) Hajj."

حَدَّثَنَا قَبِيصَةُ، حَدَّثَنَا سُفْيَانُ، عَنْ مُعَاوِيَةَ، بِهَذَا‏.‏ وَعَنْ حَبِيبِ بْنِ أَبِي عَمْرَةَ، عَنْ عَائِشَةَ بِنْتِ طَلْحَةَ، عَنْ عَائِشَةَ أُمِّ الْمُؤْمِنِينَ، عَنِ النَّبِيِّ صلى الله عليه وسلم سَأَلَهُ نِسَاؤُهُ عَنِ الْجِهَادِ فَقَالَ ‏ "‏ نِعْمَ الْجِهَادُ الْحَجُّ ‏"‏‏.‏
Reference : Sahih al-Bukhari 2876
In-book reference : Book 56, Hadith 92
USC-MSA web (English) reference : Vol. 4, Book 52, Hadith 128
  (deprecated numbering scheme)