Narrated Ibn `Umar:
The Prophet (ﷺ) said, "If the people knew what I know about traveling alone, then nobody would travel alone at night."
In-book : Book 56, Hadith 207
USC-MSA web (English) : Vol. 4, Book 52, Hadith 241 (deprecated)
56. Fighting for the Cause of Allah (Jihaad)
باب السُّجُودِ عَلَى الأَنْفِ وَالسُّجُودِ عَلَى الطِّينِ