Al-Kāfi - Volume 6 > The Undesirable Case of One’s Sleeping Alone and the Characteristics Prohibited because of its Frightfulness
Hadith #6

وَ بِإِسْنَادِهِ قَالَ إِنَّ رَسُولَ اللَّهِ ( صلى الله عليه وآله ) كَرِهَ أَنْ يَدْخُلَ بَيْتاً مُظْلِماً إِلَّا بِسِرَاجٍ .

6. Through the same chain of narrators as that of the previous Hadith the following is narrated: “The Messenger of Allah, O Allah, grant compensation to Muhammad and his family worthy of their services to Your cause, disliked entering a dark house without a lamp.”