Narrated Ibn `Umar: The Prophet said, "A woman should not travel for more than three days except with a Dhi-Mahram (i.e. a male with whom she cannot marry at all, e.g. her brother, father, grandfather, etc.) or her own husband.)"
Hadith ReferenceSahih Bukhari / The Book of Abridged Or Shortened Prayers (At-Taqsir) / Hadith: 1086
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة