(47) باب غَزْوَةِ النِّسَاءِ مَعَ الرِّجَالِ
It has been narrated on the authority of Anas b. Malik who said that the Messenger of Allah (ﷺ) allowed Umm Sulaim and some other women of the Ansar to accompany him when he went to war; they would give water (to the soldiers) and would treat the wounded.
Reference: Sahih Muslim 1810
In-book reference: Book 32, Hadith 164
USC-MSA web (English) reference(deprecated numbering scheme): Book 19, Hadith 4454