It wasnarrated that 'Ubaidullah bin 'Abdullah said:
"Umar went outonthe day of 'Eid and sent word to Abu Waqid Al-Laithi asking whatthe Prophet (ﷺ) used to recite on this day. He said: 'Qaf [Qaf(50)]and 'Iqtarabat'." [Al-Qamar (54)]
English reference: Vol. 1, Book 5, Hadith 1282
Arabic reference: Book 5, Hadith 1341