Sunan Ibn Majah, Hadith 1088 ⓘ
It was narrated that Ibn ‘Umar said: “I heard the Prophet say from the pulpit: ‘Whoever comes to Friday, let him take a bath.’”
حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ نُمَيْرٍ، حَدَّثَنَا عُمَرُ بْنُ عُبَيْدٍ، عَنْ أَبِي إِسْحَاقَ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ سَمِعْتُ النَّبِيَّ ـ صلى الله عليه وسلم ـ يَقُولُ عَلَى الْمِنْبَرِ " مَنْ أَتَى الْجُمُعَةَ فَلْيَغْتَسِلْ " .
also referenced under: Book 5, Hadith 1141 (In-Book) & Volume 2, Book 5, Hadith 1088 (DarusSalam)