I heard Abu Sa'id al-Khudri (Allah be pleased with him) saying: I heard four things from Messenger of Allah ﷺ which impressed me and captivated me (and one out of these is this), that he forbade a woman to undertake journey extending over two days but with her husband, or with a Mahram; and he then narrated the rest of the hadith.
سَمِعْتُ مِنْ رَسُولِ اللَّهِ ﷺ أَرْبَعًا فَأَعْجَبْنَنِي وَآنَقْنَنِي نَهَى أَنْ تُسَافِرَ الْمَرْأَةُ مَسِيرَةَ يَوْمَيْنِ إِلاَّ وَمَعَهَا زَوْجُهَا أَوْ ذُو مَحْرَمٍ وَاقْتَصَّ بَاقِيَ الْحَدِيثِ