Ibn 'Umar (May Allah be pleased with them) reported:
The Messenger of Allah (ﷺ) said, "Were people to know of what I know about the dangers of travelling alone, no rider would travel alone at night."[Al-Bukhari]. (DE)
App reference (DE): Book 8, Hadith 3 (DE)
Arabic/English book reference (DE): Book 8, Hadith 958 (DE)