(2) باب الطِّيبِ وَالسِّوَاكِ يَوْمَ الْجُمُعَةِ
Abu Huraira reported that the Messenger of Allah (ﷺ) said. it is the right of Allah upon every Muslim that he should take a bath (at least) on one day (Friday) during the seven days (of the week) and he should wash his head and body.
Reference: Sahih Muslim 849
In-book reference: Book 7, Hadith 13
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1844