Sunan an-Nasa'i, Book 14, Hadith 1416 (In-Book) ⓘ
It was narrated that Ibn 'Umar said: "The Messenger of Allah delivered a khutbah and said: 'When any one of you wants to go to Jumu'ah, let him perform ghusl.'"
أَخْبَرَنَا مُحَمَّدُ بْنُ بَشَّارٍ، قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنِ الْحَكَمِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ خَطَبَ رَسُولُ اللَّهِ صلى الله عليه وسلم فَقَالَ " إِذَا رَاحَ أَحَدُكُمْ إِلَى الْجُمُعَةِ فَلْيَغْتَسِلْ " .
also referenced under: Volume 2, Book 14, Hadith 1406 (DarusSalam)