عَنِ ابْنِ عُمَرَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ: ((لَوْ يَعْلَمُ النَّاسُ مَا فِي الْوَحْدَةِ مَا سَارَ أَحَدٌ وَحْدَهُ بِلَيْلٍ أَبَدًا))
It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: If people knew what harm there is in traveling alone at night, then no one would travel alone at night.