Sahih al-Bukhari 858
Book 10: Call to Prayers (Adhaan) · Narrated by Abu Sa`id Al-Khudri
Arabic
حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ، قَالَ حَدَّثَنَا سُفْيَانُ، قَالَ حَدَّثَنِي صَفْوَانُ بْنُ سُلَيْمٍ، عَنْ عَطَاءِ بْنِ يَسَارٍ، عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " الْغُسْلُ يَوْمَ الْجُمُعَةِ وَاجِبٌ عَلَى كُلِّ مُحْتَلِمٍ ".
English translation
Narrated Abu Sa`id Al-Khudri:The Prophet (ﷺ) said, "Ghusl (taking a bath) on Friday is compulsory for every Muslim reaching the age of puberty
Reference: Sahih al-Bukhari 858, Book of Call to Prayers (Adhaan). English translation by Dr. Muhammad Muhsin Khan.