Muwatta Malik, Book 10, Hadith 440 (In-Book)

Yahya related to me from Malik from Nafi that Abdullah ibn Umar did not pray either before the prayer or after it on the day of Fitr.

حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، لَمْ يَكُنْ يُصَلِّي يَوْمَ الْفِطْرِ قَبْلَ الصَّلاَةِ وَلاَ بَعْدَهَا ‏.‏

sunnah.com

also referenced under: Book 10, Hadith 10 (USC-MSA)