"The Messenger of Allah ﷺ said: 'Every Muslim man has to perform Ghusl one day in every seven, and that is on Friday.'" (Using translation from Nasāʾī 1378)
قَالَ رَسُولُ اللهِ ﷺ «عَلَى كُلِّ رَجُلٍ مُسْلِمٍ فِي كُلِّ سَبْعَةِ أَيَّامٍ غُسْلُ يَوْمٍ وَهُوَ يَوْمُ الْجُمُعَةِ»