Majma al-Zawaid — Hadith 13209

Sayyiduna Jabir (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "If people knew how much harm there is in being alone, no rider would ever travel alone at night, and no man would ever sleep alone in a house."
Al-Tabarani recorded it in al-Mu'jam al-Awsat. Its chain contains Muhammad bin al-Qasim al-Asadi, whom Yahya bin Ma'in declared thiqah (trustworthy), while Ahmad and others declared him da'if (weak). The rest of its narrators are thiqat (trustworthy).