(74) باب سَفَرِ الْمَرْأَةِ مَعَ مَحْرَمٍ إِلَى حَجٍّ وَغَيْرِهِ
Abu Sa'id (Allah be pleased with him) reported Allah's Messenger (ﷺ) as saying:
A woman should not set out on three (days') journey, but in the company of a Mahram.
Reference: Sahih Muslim 827 f
In-book reference: Book 15, Hadith 467
USC-MSA web (English) reference(deprecated numbering scheme): Book 7, Hadith 3101