ثُمَّ قَالَ : حَقٌّ عَلَى كُلِّ مُسْلِمٍ أَنْ يَغْتَسِلَ فِي كُلِّ سَبْعَةِ أَيَّامٍ ، يَوْمًا يَغْسِلُ فِيهِ رَأْسَهُ وَجَسَدَهُ " .
The Prophet (p.b.u.h) remained silent (for a while) and then said, "It is obligatory for every Muslim that he should take a bath once in seven days, when he should wash his head and body."