Sunan an-Nasa'i, Book 14, Hadith 1387 (In-Book) ⓘ
It was narrated from Ibn 'Umar that: The Messenger of Allah said: "When any one of you wants to come to Jumu'ah prayer, let him perform ghusl."
أَخْبَرَنَا قُتَيْبَةُ، عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " إِذَا جَاءَ أَحَدُكُمُ الْجُمُعَةَ فَلْيَغْتَسِلْ " .
also referenced under: Volume 2, Book 14, Hadith 1377 (DarusSalam)