Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "A man is afflicted with harm on account of four things: when he sleeps alone, when he sleeps lying on his back, when he sleeps in a sheet dyed with safflower, and when he bathes in an open space. Whoever is able not to bathe in an open space (should do so), and if he has no choice, then let him draw a line."
Al-Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains Marwan bin Salim al-Ghifari, who is matruk (abandoned).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الطب / 8472
Hadith Gradingمحدثین:ضعیف جداً
Hadith Takhrij«أخرجه المعجم الأوسط للطبراني برقم: 1909»