Hadith 504320
Chapter 10: The Two 'Ids - كتاب العيدين
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ يَغْتَسِلُ يَوْمَ الْفِطْرِ قَبْلَ أَنْ يَغْدُوَ إِلَى الْمُصَلَّى .
Yahya related to me from Malik from Nafi that Abdullah ibn Umar used to do ghusl on the day of Fitr before going to the place of prayer.
Reference Muwatta Malik 504320
USC-MSA web (English) reference : Book 10, Hadith 2