Narrated Abu Huraira through different narrators that the Prophet ﷺ said, "It is Allah's right on every Muslim that he should take a bath (at least) once in seven days."
قَالَ النَّبِيُّ ﷺ لِلَّهِ تَعَالَى عَلَى كُلِّ مُسْلِمٍ حَقٌّ أَنْ يَغْتَسِلَ فِي كُلِّ سَبْعَةِ أَيَّامٍ يَوْمًا