Sunan At-Tirmidhi

Narrated Abu Muhayyah:from Laith, from Nafi, from Ibn 'Umar that the Messenger of Allah (ﷺ) said: ""Beware of nakedness! For indeed there are with you, those who do not part from you except at the place of defecation, and when a man goes into his wife. So be shy of them and honor them