Translation
(56) Fighting for the Cause of Allah (Jihaad)
كتاب الجهاد والسير
(67) Chapter: Treatment of the wounded by the women
(67) باب مُدَاوَاةِ النِّسَاءِ الْجَرْحَى فِي الْغَزْوِ
Sahih al-Bukhari 2882 

Narrated Ar-Rubayyi 'bint Mu'auwidh:

We were in the company of the Prophet (ﷺ) providing the wounded with water and treating them and bringing the killed to Medina (from the battle field) .

حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ، حَدَّثَنَا بِشْرُ بْنُ الْمُفَضَّلِ، حَدَّثَنَا خَالِدُ بْنُ ذَكْوَانَ، عَنِ الرُّبَيِّعِ بِنْتِ مُعَوِّذٍ، قَالَتْ كُنَّا مَعَ النَّبِيِّ صلى الله عليه وسلم نَسْقِي، وَنُدَاوِي الْجَرْحَى، وَنَرُدُّ الْقَتْلَى إِلَى الْمَدِينَةِ‏.‏
Reference : Sahih al-Bukhari 2882
In-book reference : Book 56, Hadith 97
USC-MSA web (English) reference : Vol. 4, Book 52, Hadith 133
  (deprecated numbering scheme)