Chapter: The ablution for boys (youngsters). When they should perform Ghusl (take a bath) and Tuhur (purification). Their attendance at congregational prayers and their rows in the prayers.
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
In-book reference
Book 10, Hadith 249
USC-MSA web (English)
Vol. 1, Book 12, Hadith 817
Translation by Dr. M. Muhsin Khan · Language: EN
Sahih
Arabic Text
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 ".