The Messenger of Allah ﷺ said: "Ghusl on Friday is obligatory for everyone who has reached the age of puberty."  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ غُسْلُ يَوْمِ الْجُمُعَةِ وَاجِبٌ عَلَى كُلِّ مُحْتَلِمٍ  

"The Messenger of Allah ﷺ said: 'Every Muslim man has to perform Ghusl one day in every seven, and that is on Friday.'"  

قَالَ رَسُولُ اللَّهِ ﷺ عَلَى كُلِّ رَجُلٍ مُسْلِمٍ فِي كُلِّ سَبْعَةِ أَيَّامٍ غُسْلُ يَوْمٍ وَهُوَ يَوْمُ الْجُمُعَةِ