أَخْبَرَنَا قُتَيْبَةُ، عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏"‏ إِذَا جَاءَ أَحَدُكُمُ الْجُمُعَةَ فَلْيَغْتَسِلْ ‏"‏ ‏.‏

It was narrated from Ibn 'Umar that: The Messenger of Allah (PBUH) said: "When any one of you wants to come to Jumu'ah prayer, let him perform ghusl." Translation Not Available

Book Ref: Sunan An Nisai Book 14 Hadith 1377
Web Ref:  Sunan An Nisai Vol 2 Book 14 Hadith 1377