The Prophet (peace and blessings be upon him) said:
"Beware of the house (that is, the public bath) that is called the hammam; whoever enters it should cover his private parts ('awrah)."
Hadith Referenceصحیح الجامع الصغیر / حرف الألف / 116
Hadith Gradingالألبانی:صحيح
Hadith Takhrij[طب, ك, هب] عن ابن عباس. الكلم ص ١٢٨, الإرواء ٢٥٨٢.