Sunan Ibn Majah, Book 5, Hadith 1142 (In-Book) ⓘ
It was narrated from Abu Sa’eed Al-Khudri that the Messenger of Allah said: “Bath on Fridays is obligatory for every male who has reached the age of puberty.”
حَدَّثَنَا سَهْلُ بْنُ أَبِي سَهْلٍ، حَدَّثَنَا سُفْيَانُ بْنُ عُيَيْنَةَ، عَنْ صَفْوَانَ بْنِ سُلَيْمٍ، عَنْ عَطَاءِ بْنِ يَسَارٍ، عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ، أَنَّ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ قَالَ " غُسْلُ يَوْمِ الْجُمُعَةِ وَاجِبٌ عَلَى كُلِّ مُحْتَلِمٍ " .
also referenced under: Hadith 1089 (Reference) & Volume 2, Book 5, Hadith 1089 (DarusSalam)