(74) باب سَفَرِ الْمَرْأَةِ مَعَ مَحْرَمٍ إِلَى حَجٍّ وَغَيْرِهِ
This hadith has been narrated on the same authority by Ubaidullah. And in the narration of Abu Bakr (the words are):
" More than three (days)." Ibn Numair narrated on the authority of his father, (and the words are):" Three (days) except (when) she has a Mahram with her."
Reference: Sahih Muslim 1338 b
In-book reference: Book 15, Hadith 463
USC-MSA web (English) reference(deprecated numbering scheme): Book 7, Hadith 3097