Hadith #402 (Sunan al-Nasa'i)
Book: The Book of Ghusl and Tayammum
Narrator(s): Abdullah bin Abi Awfa, Mjz'ah bin Zahr bin al-Aswad مجزأة بن زاهر, Muhammad bin Ibrahim bin al-Harith محمد بن إبراهيم بن الحارث, Shu'bah bin al-Hajjaj شعبة بن الحجاج

“Whoever believes in Allah and the Last Day, let him not enter a bath house except wearing an Izar (waist wrap).”

Source: https://parallelquran.com/hadith/sunan-al-nasai-402/