Sahih al-Bukhari 919
Book 11: Friday Prayer · Narrated by Salim
Arabic
حَدَّثَنَا آدَمُ، قَالَ حَدَّثَنَا ابْنُ أَبِي ذِئْبٍ، عَنِ الزُّهْرِيِّ، عَنْ سَالِمٍ، عَنْ أَبِيهِ، قَالَ سَمِعْتُ النَّبِيَّ صلى الله عليه وسلم يَخْطُبُ عَلَى الْمِنْبَرِ فَقَالَ " مَنْ جَاءَ إِلَى الْجُمُعَةِ فَلْيَغْتَسِلْ ".
English translation
Narrated Salim:My father said , "I heard the Prophet (ﷺ) delivering the Khutba on the pulpit and he said, 'Whoever comes for the Jumua prayer should take a bath (before coming)
Reference: Sahih al-Bukhari 919, Book of Friday Prayer. English translation by Dr. Muhammad Muhsin Khan.