Arabic (Original)
وَسَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُولُ لَا تُسَافِرُ الْمَرْأَةُ إِلَّا مَعَ زَوْجِهَا أَوْ ذِي مَحْرَمٍ مِنْهَا.
English Translation
And I heard the Messenger of Allah, peace and blessings be upon him, say, "A woman should not travel except with her husband or a mahram (unmarriageable relative) of hers."