Hadith 615
´It was narrated that 'Abdullah bin Mas'ud said:` "The Messenger of Allah said: 'No one of you should bathe in open land or on a roof where he is not concealed; even if he does not see anyone, he can still be seen.'"
Hadith 2262
´It was narrated that Ibn 'Umar said:` "I used to sell camels, and I used to buy gold for silver and silver for gold, Dinar for Dirham and Dirham for Dinar. I asked the Prophet (ﷺ) about that, and he said: 'If you take one of them and give the other, then you and your companion should not separate until everything is clear (i.e., the exchange is completed).’” (Hasan) Another chain with similar wording.