Sahih al-Bukhari, Volume 2, Book 13, Hadith 4 (USC-MSA) ⓘ
Narrated Abu Sa`id Al-Khudri: Allah's Messenger (p.b.u.h) said, "The taking of a bath on Friday is compulsory for every male (Muslim) who has attained the age of puberty."
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، قَالَ أَخْبَرَنَا مَالِكٌ، عَنْ صَفْوَانَ بْنِ سُلَيْمٍ، عَنْ عَطَاءِ بْنِ يَسَارٍ، عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ ـ رضى الله عنه ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " غُسْلُ يَوْمِ الْجُمُعَةِ وَاجِبٌ عَلَى كُلِّ مُحْتَلِمٍ " .
also referenced under: Book 11, Hadith 4 (In-Book) & Hadith 879 (DarusSalam)