Sahih Muslim #3274 · The Book of Pilgrimage

Sahih MuslimIbn Juraij narrated this hadith with the same chain of transmitters
Sahih Muslim · Book 15 · The Book of Pilgrimage
Sahih Muslim · كتاب 15 · كتاب الحج
" No person (man) should be alone with a woman except when there is a Mahram with her."
وَحَدَّثَنَا ابْنُ أَبِي عُمَرَ، حَدَّثَنَا هِشَامٌ، - يَعْنِي ابْنَ سُلَيْمَانَ - الْمَخْزُومِيُّ عَنِ ابْنِ، جُرَيْجٍ بِهَذَا الإِسْنَادِ نَحْوَهُ وَلَمْ يَذْكُرْ ‏
"‏ لاَ يَخْلُوَنَّ رَجُلٌ بِامْرَأَةٍ إِلاَّ وَمَعَهَا ذُو مَحْرَمٍ ‏"‏ ‏.‏
Reference : Sahih Muslim 3274In-book reference : Book 15, Hadith 478