It is narrated from Sayyiduna Abdullah bin Zubair (may Allah be pleased with them both) that Sayyidah Aisha (may Allah be pleased with her) informed him that ghusl (ritual bath) should be performed for four things: (1) due to janabah (major ritual impurity), (2) on the day of Jumu’ah (Friday), (3) after washing a deceased person, (4) after cupping.
Hadith Referenceصحيح ابن خزيمه / جماع أبواب غسل التطهير والاستحباب من غير فرض ولا إيجاب / 256