Muwatta Malik 1800
موطأ مالك#1800SahihMalik related to me from Said ibn Abi Said al-Maqburi from Abu Hurayra that the Messenger of Allah, may Allah bless him and grant him peace, said, "It is not halal for a woman who believes in Allah and the Last Day to travel the distance of a day and night without a man who is her mahram
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Salim al-HilaliSahih
In-book reference: 54:38