Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates that the Prophet (peace and blessings be upon him) said: "Indeed, Allah Almighty forbids you from being naked. Feel shy before those angels of Allah Almighty who do not part from you except in three situations: when relieving oneself, in the state of janabah (major ritual impurity), and when bathing. When one of you is about to bathe in an open place, he should screen himself with a cloth, or take cover behind a stump of a wall, or behind his camel."
Al-Bazzar recorded it and said: "From Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) it is narrated only through this chain, and the narrator Ja'far bin Sulayman is layyin (somewhat weak)." (Allamah al-Haythami says:) I say: Ja'far bin Sulayman is one of the narrators of the Sahih, and the same is true of the rest of its narrators. And Allah knows best.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الطهارة / 1454